Life Science

Transport in Plants -Translocation

By the end of the lesson, the learner should be able to:
- Explain the process of translocation of sugars and nutrients through the phloem from source to sink
- Describe the pressure-flow mechanism in translocation
- Relate translocation to real-life agricultural practices such as ring barking experiments showing that phloem carries food

In groups, learners are guided to:
- Research the process of translocation using textbooks or online resources and write notes
-Carry out a ring barking (girdling) experiment on a woody stem and observe swelling above the removed bark after two weeks
-Discuss findings with peers and relate results to the role of phloem

How are sugars and nutrients transported from leaves to other parts of the plant through translocation?

Humming Bird General Science pg. 51
- Healthy woody stem
- Sharp knife, ruler, marker pen
- Digital devices with internet access
- Reference books

- Experiments -Observation -Oral questions

Life Science

Transport in Plants -Structural factors affecting transpiration
Transport in Plants -Environmental factors affecting transpiration

By the end of the lesson, the learner should be able to:
- Investigate structural factors affecting the rate of transpiration including stomata number, leaf size, cuticle thickness and leaf orientation
- Describe how leaf structure in different environments such as desert and aquatic plants affects water loss
- Relate leaf adaptations to real-life examples such as cacti having fewer stomata to survive dry conditions

In groups, learners are guided to:
- Visit the school garden and observe structural features of plants in exposed, shaded and aquatic areas
-Use cobalt(II) chloride paper on leaf surfaces to compare transpiration rates on upper and lower surfaces
-Record observations and discuss which structural features help reduce water loss

How do the structural features of a leaf influence the rate of transpiration?

Humming Bird General Science pg. 51
- Cobalt(II) chloride paper
- Fresh leaves, glass slides, elastic bands
- Stopwatch
- Reference books
- Potometer, fresh leafy shoot
- Water, vaseline, ruler, stopwatch
- Digital devices with internet access

- Experiments -Observation -Oral questions

Life Science

Transport in Plants -Importance of transpiration
Transport in Plants -Watering and manuring plants

By the end of the lesson, the learner should be able to:
- Describe the significance of transpiration in sustainability of plant life including cooling, transpiration pull and waste removal
- Carry out an activity to show water vapour loss through leaves using a plastic bag
- Relate transpiration to real-life observations such as condensation on the inside of a plastic bag covering leaves on a sunny day

In groups, learners are guided to:
- Enclose some leaves in a transparent plastic bag, seal it and place in sunlight for 30 to 60 minutes then observe condensation
-Discuss how transpiration contributes to cooling, water movement and photosynthesis
-Write short notes on the importance of transpiration

Why is transpiration described as both a necessary and beneficial process for plants?

Humming Bird General Science pg. 51
- Potted leafy plants or leafy branches
- Transparent plastic bags, rubber bands
- Reference books
- Charts, posters, brochures
- Samples of fertilisers (DAP, CAN, Urea)
- Digital devices with internet access

- Observation -Oral questions -Written assignments

Life Science

Respiration -Definition and meaning of respiration
Respiration -Aerobic respiration

By the end of the lesson, the learner should be able to:
- Explain the meaning of respiration as the process by which living organisms break down organic food to release energy
- Distinguish between breathing and cellular respiration
- Relate respiration to real-life experiences such as feeling tired after exercise because cells need more energy

In groups, learners are guided to:
- Study a diagram of the respiration process and discuss what is happening
-Discuss the meaning of respiration with peers and write the definition in exercise books
-Discuss why breathing becomes faster during exercise and relate to the body's increased energy demand

What is respiration and why is it essential for all living organisms?

Humming Bird General Science pg. 69
- Digital devices with internet access
- Diagrams of respiration
- Reference books
- Germinating seeds (beans or peas)
- Thermos flask, thermometer, cotton wool

- Oral questions -Written assignments -Observation

Life Science

Respiration -Anaerobic respiration
Respiration -Fermentation

By the end of the lesson, the learner should be able to:
- Describe the process of anaerobic respiration in yeast and in animals including fermentation and lactic acid production
- Write the equations for anaerobic respiration in yeast and in animals
- Relate anaerobic respiration to real-life experiences such as muscle cramps during intense exercise due to lactic acid build-up

In groups, learners are guided to:
- Mix yeast with glucose solution, connect to limewater and observe the milky change as carbon(IV) oxide is produced
-Discuss the differences between aerobic and anaerobic respiration using a comparison table
-Do jumping exercises for two minutes and observe changes in breathing and muscle fatigue

Why does the body switch to anaerobic respiration during intense physical activity and what are the consequences?

Humming Bird General Science pg. 69
- Glucose solution, yeast, limewater
- Test tubes, delivery tube, warm water bath
- Reference books
- Digital devices with internet access
- Yeast, glucose solution, balloons, warm water
- Litmus papers (blue and red), sour milk

- Experiments -Observation -Oral questions

Life Science

Respiration -Respiratory quotient and respiratory substrates
Respiration -Factors affecting respiration

By the end of the lesson, the learner should be able to:
- Explain the concept of respiratory quotient (RQ) as the ratio of CO₂ produced to O₂ consumed
- Calculate the RQ for carbohydrates, fats and proteins and identify the type of respiration occurring
- Relate RQ values to real-life dietary understanding such as why athletes use carbohydrates as a preferred energy substrate for quick energy release

In groups, learners are guided to:
- Study a diagram explaining respiratory quotient and discuss its meaning
-Calculate RQ values from given equations and identify the substrate and type of respiration
-Work through individual and group RQ calculation problems and present solutions

How does the respiratory quotient help us determine which food substrate is being broken down during respiration?

Humming Bird General Science pg. 69
- Digital devices with internet access
- Diagrams of respiratory quotient
- Reference books
- Case study cards

- Written tests -Oral questions -Observation

Life Science

Respiration -Economic importance of anaerobic respiration
Respiration -Making products through anaerobic respiration

By the end of the lesson, the learner should be able to:
- Describe the economic importance of anaerobic respiration at home and in industry including baking, biogas production, pharmaceuticals and waste management
- Explain how anaerobic respiration is applied in food preservation, biofuel production and medicine
- Relate anaerobic respiration to real-life economic activities such as biogas plants reducing household energy costs

In groups, learners are guided to:
- Research the economic importance of anaerobic respiration using online resources and textbooks
-Plan a visit to a nearby waste treatment or biogas facility and observe how organic waste is converted to methane
-Prepare and present a detailed report on the economic significance of anaerobic respiration

How does anaerobic respiration contribute to economic development at the household and industrial level?

Humming Bird General Science pg. 69
- Digital devices with internet access
- Reference books
- Resource persons from biogas or food processing facilities
- Plastic containers, balloons, plastic tubing
- Organic waste (food peels, manure)

- Projects -Oral presentations -Written reports

Life Science

Plant Growth and Development -Concept of growth and development
Plant Growth and Development -Seed dormancy

By the end of the lesson, the learner should be able to:
- Explain the meaning of growth and development in plants distinguishing quantitative growth from qualitative development
- Describe the differences between growth and development including cell division, elongation and differentiation
- Relate plant growth to real-life observations such as measuring the increase in height of seedlings over time in a garden

In groups, learners are guided to:
- Observe a diagram showing different stages of plant growth from seed to maturity and describe changes
-Carry out a hands-on activity by planting bean seeds, measuring height every three days and recording development indicators
-Discuss with peers the differences between growth and development using a comparison table

What is the difference between growth and development in plants and why are both important for plant survival?

Humming Bird General Science pg. 88
- Small pots, soil, bean or pea seeds
- Ruler, water, digital camera
- Reference books
- Notebook, pen, camera
- Seed samples from different environments
- Digital devices with internet access

- Observation -Written assignments -Oral questions

Life Science

Plant Growth and Development -Conditions necessary for germination
Plant Growth and Development -Types of germination

By the end of the lesson, the learner should be able to:
- Investigate the conditions necessary for germination including water, oxygen and suitable temperature
- Explain why each condition is essential for the germination process
- Relate germination conditions to real-life farming practices such as irrigating seedbeds to provide moisture and choosing planting seasons with optimal temperatures

In groups, learners are guided to:
- Set up four glass jars with different water and oxygen conditions to investigate their effects on germination
-Set up glass jars at different temperatures (refrigerator, incubator and oven) to investigate the effect of temperature on germination
-Observe and record daily changes then draw conclusions

What conditions are essential for seed germination and how does each condition support the germination process?

Humming Bird General Science pg. 88
- Glass jars, bean seeds (soaked)
- Cotton wool, pyrogallic acid or NaOH
- Thermometer, refrigerator, incubator
- Reference books
- Bean seeds, maize seeds (soaked overnight)
- Pots with soil, ruler, water, notebook
- Digital devices with internet access

- Experiments -Observation -Written assignments

Life Science

Plant Growth and Development -Primary and secondary growth
Plant Growth and Development -Factors influencing growth and development

By the end of the lesson, the learner should be able to:
- Distinguish between primary growth at apical meristems and secondary growth at lateral meristems
- Describe the three zones of primary growth including cell division, elongation and differentiation
- Relate secondary growth to real-life observations such as the annual rings seen in a cross-section of a tree trunk used in timber production

In groups, learners are guided to:
- Search for differences between primary and secondary growth using digital devices or textbooks
-Study longitudinal sections of stem and root tips to identify zones of cell division, elongation and differentiation
-Prepare and present a PowerPoint presentation on primary and secondary growth to the class

How does primary growth differ from secondary growth and what structures are responsible for each type?

Humming Bird General Science pg. 88
- Digital devices with internet access
- Diagrams of stem and root tip sections
- Reference books
- Presentation tools
- Concept map of growth factors

- Oral presentations -Written tests -Observation

Life Science

Plant Growth and Development -Role of growth hormones in plants
Microorganisms -Types of microorganisms

By the end of the lesson, the learner should be able to:
- Describe the roles of auxins, gibberellins, cytokinins, abscisic acid and ethylene in plant growth and development
- Match each hormone to its specific function in plant growth
- Relate plant hormones to real-life applications such as using auxins as rooting powder to promote root growth in plant cuttings or ethylene to ripen bananas commercially

In groups, learners are guided to:
- Read a gazette excerpt on plant growth hormones and identify the role of each hormone
-Match hormone name cards to their function cards in a group activity
-Write short notes on the role of each plant growth hormone in exercise books

How do plant growth hormones regulate growth, development and responses to the environment in plants?

Humming Bird General Science pg. 88
- Digital devices with internet access
- Hormone and function cards
- Reference books
- Print media
Humming Bird General Science pg. 111
- Digital devices with internet access (virtual lab tour)
- Diagrams of microorganisms

- Oral questions -Written tests -Observation

Life Science

Microorganisms -Modes of transmission and infections
Microorganisms -Prevention and control of microorganism infections

By the end of the lesson, the learner should be able to:
- Explain the modes of transmission of microorganisms in human beings including airborne, direct contact, contaminated food/water, vector-borne and bloodborne transmission
- Identify the types of infections caused by bacteria, viruses and fungi in human beings
- Relate modes of transmission to real-life public health measures such as wearing masks in crowded areas to prevent airborne viral infections

In groups, learners are guided to:
- Search for information on modes of transmission of microorganisms using digital or print media
-Plan and carry out a visit to a nearby health centre to observe how microorganisms spread and engage with health officers
-Study case scenarios and identify the possible microorganism responsible and how it spread

How do different microorganisms spread from one person to another and what infections do they cause?

Humming Bird General Science pg. 111
- Digital devices with internet access
- Case scenario cards
- Reference books
- Resource persons (health officers)
- Charts on prevention methods

- Oral questions -Observation -Written assignments

Life Science
Matter and Chemical Reactions
Matter and Chemical Reactions
Matter and Chemical Reactions

Microorganisms -Economic importance of microorganisms
The Periodic Table -Atomic structure review
The Periodic Table -Electron arrangement of atoms
The Periodic Table -Classifying elements into groups and periods

By the end of the lesson, the learner should be able to:
- Explain the economic importance of microorganisms in food production, medicine, agriculture, biofuel production and environmental management
- Carry out a project investigating mould growth on food substrates
- Relate the economic role of microorganisms to real-life industries such as pharmaceutical companies using bacteria to produce antibiotics and farmers using nitrogen-fixing bacteria to improve soil fertility

In groups, learners are guided to:
- Watch videos or virtual simulations on microbial applications in food production, medicine and waste management
-Plan a visit to a dairy farm or food processing plant to observe how microorganisms are used in production
-Compile a report and sensitise the community on the significance of food preservation

How do microorganisms contribute to economic development in food production, medicine, agriculture and environmental management?

Humming Bird General Science pg. 111
- Digital devices with internet access
- Bread samples for mould growth investigation
- Reference books
- Resource persons from dairy or food processing plants
- Humming Bird General Science pg. 128
- Digital devices
- Internet access
- Periodic table charts
- Periodic table
- Element cards

- Projects -Oral presentations -Written reports

Matter and Chemical Reactions

The Periodic Table -Stability and electron affinity of atoms
The Periodic Table -Ion formation for the first 20 elements
The Periodic Table -Valency and oxidation numbers of elements
The Periodic Table -Oxidation numbers and radicals

By the end of the lesson, the learner should be able to:
- Explain the concept of atomic stability in relation to the outermost energy level
- Describe electron affinity and how it drives atoms to gain or lose electrons
- Relate atomic stability to real-life processes such as why metals corrode and why noble gases are used in lighting

In groups, learners are guided to:
- Discuss how atoms achieve stability by losing or gaining electrons
- Use the classroom scenario analogy to explain stability
- Identify which of the first 20 elements tend to lose or gain electrons
- Share findings with peers for peer review

Why do atoms of most elements gain or lose electrons to become stable?

- Humming Bird General Science pg. 128
- Digital devices
- Reference books
- Periodic table
- Internet access

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

The Periodic Table -Chemical formulae of common compounds
The Periodic Table -Writing and balancing chemical equations
Chemical Families -Alkali metals: properties and reactions

By the end of the lesson, the learner should be able to:
- Write the chemical formula of simple compounds using valencies of elements
- Write the chemical formula of compounds containing radicals
- Connect chemical formulae to reading product labels in pharmacy, agriculture and food industries

In groups, learners are guided to:
- Use the valency swap method to write formulae for lithium oxide, potassium fluoride, calcium nitrate, sodium hydroxide and ammonium carbonate
- Practice writing formulae with radicals using brackets correctly
- Discuss and share work with peers for peer assessment
- Correct errors and write accurate formulae in exercise books

How do valencies of elements and radicals help us write correct chemical formulae?

- Humming Bird General Science pg. 128
- Periodic table
- Digital devices
- Reference books
- Humming Bird General Science pg. 153
- Small samples of alkali metals
- Electrical circuit apparatus

- Written assignments - Oral questions - Observation

Matter and Chemical Reactions

Chemical Families -Alkaline earth metals: properties and reactions
Chemical Families -Halogens: properties and reactions

By the end of the lesson, the learner should be able to:
- Identify alkaline earth metals and describe their physical properties including appearance, atomic radius, ionisation energy, melting point and electrical conductivity
- Describe the chemical reactions of magnesium with oxygen and dilute acid
- Connect the properties of alkaline earth metals to uses in construction materials, aerospace alloys and medicines such as antacids

In groups, learners are guided to:
- Investigate physical properties of alkaline earth metals using Hands-on Activities and Tables 2.15–2.19
- Carry out or observe the reaction of magnesium with oxygen and with hydrochloric acid
- Write balanced equations for magnesium reacting with oxygen and with HCl
- Discuss uses of alkaline earth metals and write notes in exercise books

How are the properties of alkaline earth metals suited to their uses in industry and medicine?

- Humming Bird General Science pg. 153
- Magnesium ribbon
- Bunsen burner
- Dilute hydrochloric acid
- Digital devices
- Reference books
- Samples of chlorine, bromine and iodine
- Test tubes and droppers
- Hexane

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Chemical Families -Noble gases: properties and applications
Chemical Families -Transition metals: properties and uses

By the end of the lesson, the learner should be able to:
- Explain the unreactive nature of noble gases in relation to their full outer electron shells
- Describe the physical properties of noble gases including state, melting point, boiling point and density
- Connect the properties of noble gases to real-life uses such as helium in balloons, neon in signage and argon in arc welding

In groups, learners are guided to:
- Study the unreactive nature of noble gases using the classroom seating analogy
- Study Table 2.28 on physical properties of noble gases
- Watch a video or use the provided link to research applications of noble gases
- Discuss pictures of noble gas applications and write notes in exercise books

Why are noble gases chemically unreactive and how does this make them safe for use in lighting and welding?

- Humming Bird General Science pg. 153
- Digital devices
- Internet access
- Reference books
- Metal samples (copper, iron, zinc, lead)
- Electrical circuit apparatus

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Chemical Families -Uses of elements and applications in road illumination
Chemical Bonding -Role of valence electrons in bond formation

By the end of the lesson, the learner should be able to:
- Outline the uses of selected elements and their compounds from all chemical families
- Explain the properties of sodium, neon and phosphorus that make them suitable for illuminating roads
- Connect the properties of elements to engineering decisions such as choosing materials for street lighting, road signs and vehicle manufacturing

In groups, learners are guided to:
- Study the PowerPoint presentation scenario on road illumination from the course book
- Discuss properties of sodium, neon, tungsten and LED components used in road lighting
- Use digital devices to prepare a similar presentation on properties of elements suited to road illumination
- Share work with peers and discuss findings with parents or guardians

What properties must an element have to be suitable for use in road illumination?

- Humming Bird General Science pg. 153
- Digital devices
- Internet access
- Reference books
- Charts and pictures
- Humming Bird General Science pg. 189

- Oral questions - Observation - Written assignments

Matter and Chemical Reactions

Chemical Bonding -Ionic bonding in NaCl, MgF₂ and Al₂O₃
Chemical Bonding -Covalent bonding in H₂, HCl, H₂O, NH₃ and O₂

By the end of the lesson, the learner should be able to:
- Describe the formation of ionic bonds through the complete transfer of electrons
- Draw dot-and-cross diagrams to illustrate ionic bonding in sodium chloride, potassium fluoride and magnesium chloride
- Connect ionic bonding to real-life compounds such as table salt used in food preservation and magnesium compounds used in medicines

In groups, learners are guided to:
- Study Figure 2.25 on ionic bonding in sodium chloride
- Draw dot-and-cross diagrams for NaCl, KF and MgCl₂
- Model an ionic bond in sodium chloride using plasticine balls or beads
- Discuss other compounds that contain ionic bonds and share with peers

How does the transfer of electrons between a metal and a non-metal result in the formation of an ionic bond?

- Humming Bird General Science pg. 189
- Plasticine or beads for modelling
- Digital devices
- Reference books
- Toothpicks and beads for modelling

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Chemical Bonding -Dative-covalent bond in NH₄⁺
Chemical Bonding -Hydrogen bonds and Van der Waals forces

By the end of the lesson, the learner should be able to:
- Explain the formation of a dative-covalent bond where both electrons come from the same atom
- Illustrate the formation of the ammonium ion from ammonia and a hydrogen ion
- Relate dative bonding to the chemistry of fertilisers such as ammonium nitrate where the ammonium ion plays a key role

In groups, learners are guided to:
- Study Figure 2.35 on the formation of the ammonium ion through a dative bond
- Draw the dot-and-cross diagram of the ammonium ion
- Discuss the difference between a covalent bond and a dative-covalent bond
- Share findings with peers and write notes in exercise books

What makes a dative-covalent bond different from an ordinary covalent bond?

- Humming Bird General Science pg. 189
- Digital devices
- Internet access
- Reference books
- Beads and strings for modelling

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Chemical Bonding -Metallic bonding and metallic structure
Chemical Bonding -Giant ionic, simple molecular and giant atomic structures

By the end of the lesson, the learner should be able to:
- Describe the structure of a metal as positive ions surrounded by a sea of delocalised electrons
- Explain how metallic bonding accounts for the physical properties of metals including conductivity, malleability and ductility
- Connect metallic bonding to real-life applications such as aluminium in aircraft and cooking utensils, and copper in electrical wiring

In groups, learners are guided to:
- Study Table 2.36 on physical properties of metallic substances
- Study Figure 2.38 on the metallic structure of calcium
- Discuss why metals are good conductors of electricity and heat
- Plan a visit to an industry to explore how metals are selected for specific uses
- Discuss findings with peers

How does the sea of delocalised electrons in metals explain their unique physical properties?

- Humming Bird General Science pg. 189
- Digital devices
- Reference books
- Metal samples
- Charts showing molecular structures

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Chemical Bonding -Uses of diamond, graphite and aluminium
Acids, Bases and Salts -Meaning and definition of acids and bases

By the end of the lesson, the learner should be able to:
- Explain the uses of diamond, graphite and aluminium in relation to their bond types and structures
- Select appropriate materials for specific applications based on their physical properties
- Connect material selection to everyday engineering decisions such as choosing aluminium for aircraft, graphite for pencils and diamond for drilling

In groups, learners are guided to:
- Study Table 2.35 on uses of diamond, graphite and aluminium in relation to their bond types
- Work through the three engineering scenarios in the course book to select the best material
- Sensitise the community on the use and care of aluminium cookware
- Discuss and share findings with peers

How does understanding the bond type and structure of a material help engineers choose the right material for each job?

- Humming Bird General Science pg. 189
- Digital devices
- Reference books
- Aluminium cookware samples
- Humming Bird General Science pg. 208
- Phenolphthalein indicator
- Hydrochloric acid
- Sodium hydroxide solution
- Beakers and stirring rods

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Acids, Bases and Salts -Classifying substances using the universal indicator and pH chart
Acids, Bases and Salts -Role of acids and bases in biological processes

By the end of the lesson, the learner should be able to:
- Use the universal indicator and pH chart to classify substances as acidic, neutral or alkaline
- Describe the colour changes of the universal indicator across the pH scale
- Connect pH knowledge to everyday decisions such as testing soil pH for farming, checking swimming pool water and reading food labels

In groups, learners are guided to:
- Carry out Hands-on Activity 2 testing bleach, vinegar, antacids, soda, juices, water, wood ash and lemon using universal indicator
- Match observed colours against the pH chart
- Study Tables 2.40 and 2.41 on colours of substances in universal indicator
- Discuss and share findings with peers

How does the pH of a substance determine whether it is safe or harmful to use in food, farming or cleaning?

- Humming Bird General Science pg. 208
- Universal indicator solution
- pH chart
- Test tubes and droppers
- Various household substances
- Test tubes and test tube rack
- Pepsin suspension
- Egg albumen
- Hydrochloric acid
- Limewater and straws

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Acids, Bases and Salts -Reaction of acids with bases (neutralisation)
Acids, Bases and Salts -Reaction of acids with carbonates

By the end of the lesson, the learner should be able to:
- Describe the neutralisation reaction between an acid and a base to produce a salt and water
- Write balanced chemical equations for acid-base neutralisation reactions
- Relate neutralisation to real-life situations such as using antacids to neutralise excess stomach acid and liming acidic soils to improve crop production

In groups, learners are guided to:
- Carry out Hands-on Activity on titration of hydrochloric acid with sodium hydroxide using phenolphthalein indicator
- Identify the products of the neutralisation reaction
- Write the balanced equation for NaOH + HCl
- Discuss other examples of neutralisation reactions in daily life

Why is the neutralisation reaction between acids and bases important in medicine, agriculture and industry?

- Humming Bird General Science pg. 208
- Burette and clamp
- Pipette and filler
- Phenolphthalein indicator
- Hydrochloric acid
- Sodium hydroxide solution
- Zinc carbonate
- Dilute nitric acid
- Limewater
- Delivery tube and conical flask
- Digital devices

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Acids, Bases and Salts -Reaction of acids with metals
Acids, Bases and Salts -Classifying salts by behaviour when exposed to air

By the end of the lesson, the learner should be able to:
- Describe the reaction of a dilute acid with a metal to produce a salt and hydrogen gas
- Write balanced chemical equations for acid-metal reactions
- Relate acid-metal reactions to practical situations such as the corrosion of metal pipes and tools by acidic substances and the production of hydrogen gas in industry

In groups, learners are guided to:
- Carry out Hands-on Activity 6 on the reaction of magnesium ribbon with dilute hydrochloric acid
- Test the gas produced using a burning splint
- Measure the pH of the filtrate using universal indicator
- Write the balanced equation for the reaction and discuss findings with peers

How does the reaction of acids with metals explain the corrosion of metallic structures in acidic environments?

- Humming Bird General Science pg. 208
- Magnesium ribbon
- Dilute hydrochloric acid
- Conical flask and gas syringe
- Universal indicator
- Burning splint
- Petri dishes
- Sodium hydroxide pellets
- Calcium chloride crystals
- Sodium carbonate crystals
- Digital devices

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Acids, Bases and Salts -Applications of salts in daily life
Acids, Bases and Salts -Effects of salts on the environment and human health

By the end of the lesson, the learner should be able to:
- Outline the applications of salts in agriculture, food industry, medicine, laundry and road use
- Identify specific salts and their functions in each sector
- Connect knowledge of salts to informed consumer choices such as reading food labels for sodium content and understanding which fertilisers to recommend for different soils

In groups, learners are guided to:
- Research applications of salts using digital devices or print media
- Study Table 2.42 on applications of salts across different industries
- Study the pictures in Figure 2.51 and identify uses of common salts
- Discuss findings with peers and write notes in exercise books

How are salts used across different sectors of the economy to improve human health and productivity?

- Humming Bird General Science pg. 208
- Digital devices
- Internet access
- Reference books
- Charts and pictures
- Pamphlets on salt and blood pressure

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Rates of Reactions -Meaning of the rate of a chemical reaction
Rates of Reactions -Performing experiments to measure reaction rates
Rates of Reactions -Effect of concentration on reaction rate

By the end of the lesson, the learner should be able to:
- Define the rate of a chemical reaction
- Describe qualitatively how fast or slow a reaction proceeds
- Relate the concept of reaction rate to everyday observations such as the rapid burning of a match, the slow rusting of iron and the quick fizzing of a fizzy drink when opened

In groups, learners are guided to:
- Discuss the rate of sugar dissolving in water using the tea-making scenario
- Carry out Hands-on Activity on baking soda and vinegar in a balloon to observe the speed of gas production
- Compare the combustion rates of magnesium ribbon and charcoal
- Record observations and discuss findings with peers

What does the rate of a chemical reaction tell us about how quickly useful or harmful changes happen around us?

- Humming Bird General Science pg. 231
- Conical flask and balloon
- Baking soda and vinegar
- Magnesium ribbon
- Bunsen burner
- Stopwatch
- Sodium metal and calcium
- Beakers of water
- Sodium sulphate solution
- Barium chloride solution
- Conical flasks and labels
- Hydrochloric acid (2M)
- Measuring cylinder

- Oral questions - Observation - Written tests

Matter and Chemical Reactions

Rates of Reactions -Effect of temperature on reaction rate
Rates of Reactions -Effect of surface area on reaction rate

By the end of the lesson, the learner should be able to:
- Explain how increasing temperature increases the rate of a reaction by increasing kinetic energy of particles
- Carry out an experiment to investigate the effect of temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid
- Relate temperature effects to everyday situations such as why food cooks faster at higher temperatures and why refrigeration preserves food longer

In groups, learners are guided to:
- Carry out Hands-on Activity 5 using sodium thiosulphate and hydrochloric acid at different temperatures (room temperature, 30°C, 40°C, 50°C and 60°C)
- Record time for the cross to become invisible at each temperature
- Draw a graph of rate of reaction against temperature
- Discuss the cooking scenario and relate to optimum temperature effects

Why does increasing temperature speed up chemical reactions, and how is this used in cooking and food preservation?

- Humming Bird General Science pg. 231
- Conical flasks
- Sodium thiosulphate solution
- Hydrochloric acid
- Thermometer and stopwatch
- White paper with cross
- Marble chips and marble powder
- Dilute hydrochloric acid
- Gas syringe and conical flask
- Weighing balance
- Stopwatch

- Oral questions - Observation - Written assignments

Matter and Chemical Reactions

Rates of Reactions -Effect of catalysts on reaction rate
Rates of Reactions -Effect of light and pressure on reaction rate

By the end of the lesson, the learner should be able to:
- Explain how a catalyst speeds up a reaction by lowering the activation energy without being consumed
- Carry out an experiment to demonstrate the effect of manganese(IV) oxide on the decomposition of hydrogen peroxide
- Connect catalysis to real-life applications such as catalytic converters in vehicle exhaust systems and enzymes as biological catalysts in digestion

In groups, learners are guided to:
- Carry out Hands-on Activity 6 on the decomposition of hydrogen peroxide with and without manganese(IV) oxide
- Test the gas produced using a glowing splint
- Study Figure 2.54 on the effect of catalysts on reaction rate
- Read the ammonia manufacture scenario and discuss with peers how industrial catalysts save energy

How do catalysts make chemical reactions more efficient, and why are they important in industry and in our bodies?

- Humming Bird General Science pg. 231
- Hydrogen peroxide solution
- Manganese(IV) oxide
- Boiling tubes and wooden splint
- Digital devices
- Reference books
- Silver nitrate solution
- Potassium bromide solution
- Test tubes and a box

- Oral questions - Observation - Written assignments

Matter and Chemical Reactions
Natural Physical Science
Natural Physical Science

Rates of Reactions -Importance of optimum conditions in biological, chemical and physical processes
Turning Effect of Force -Meaning of moment of force
Turning Effect of Force -Factors affecting turning effect

By the end of the lesson, the learner should be able to:
- Define optimum conditions and explain their importance in biological, chemical and physical processes
- Describe how optimum conditions maximise efficiency in industrial processes such as the Haber process and in biological processes such as enzyme activity
- Connect optimum conditions to everyday decisions such as setting the correct oven temperature for baking, maintaining body temperature for health and choosing the right conditions for fermenting yoghurt

In groups, learners are guided to:
- Research the importance of optimum conditions using digital devices
- Study Table 2.49 summarising optimum conditions for biological, chemical and physical processes
- Read and discuss the findings of Groups A, B and C from the factory field trip scenario
- Discuss other processes where optimising conditions is beneficial and share with peers

Why is controlling temperature, pressure and concentration so important for making chemical and biological processes safe and efficient?

- Humming Bird General Science pg. 231
- Digital devices
- Internet access
- Reference books
- Charts summarising optimum conditions
- Humming Bird General Science Learner's Book pg. 252
- Digital resources
- Spanners, lift pump, metre rule

- Oral questions - Observation - Written assignments

Natural Physical Science

Turning Effect of Force -Calculating moment (M = F × d)
Turning Effect of Force -Principle of moments
Turning Effect of Force -Calculations using principle of moments
Turning Effect of Force -Moments due to beam weight

By the end of the lesson, the learner should be able to:
- State the formula for moment of a force as M = F × d
- Calculate the moment of a force given force and perpendicular distance
- Relate moment calculations to real-life tools such as spanners and crowbars

In groups, learners are guided to:
- Work through examples of calculating moments using M = F × d
- Solve numerical problems involving moment of a force about a pivot
- Discuss and compare answers with peers

How do engineers use the moment formula when designing tools like wrenches and levers?

- Humming Bird General Science Learner's Book pg. 254
- Calculator
- Reference books
- Humming Bird General Science Learner's Book pg. 256
- Metre rule, string, known masses, stand
- Digital resources
- Humming Bird General Science Learner's Book pg. 258
- Metre rule, spring balance, stand

- Written assignments - Oral questions

Natural Physical Science

Turning Effect of Force -Antiparallel forces
Turning Effect of Force -Calculations on antiparallel forces
Turning Effect of Force -Real-life applications and importance

By the end of the lesson, the learner should be able to:
- Define antiparallel forces and describe how they act on an object
- Distinguish between a single force and a couple (antiparallel forces)
- Relate antiparallel forces to everyday examples such as turning a bicycle handlebar or steering wheel

In groups, learners are guided to:
- Watch animations or simulations on moments of antiparallel forces using a digital device
- Attach Newton balances at both ends of a wooden strip and compare force required to rotate the strip with one and two balances
- Discuss findings with peers

How does a driver use two hands on a steering wheel to turn it more effectively than using one hand?

- Humming Bird General Science Learner's Book pg. 260
- Wooden strip, Newton balances, screw
- Digital resources
- Humming Bird General Science Learner's Book pg. 261
- Calculator
- Reference books
- Humming Bird General Science Learner's Book pg. 263
- Internet access

- Observation - Oral questions

Natural Physical Science

Linear Motion -Distance and displacement
Linear Motion -Calculations on distance and displacement

By the end of the lesson, the learner should be able to:
- Define distance and displacement and state their SI units
- Distinguish between distance and displacement using practical examples
- Relate the difference between distance and displacement to navigation and everyday travel

In groups, learners are guided to:
- Mark points A, B and C in the field using pegs
- Measure the length AC through B (distance) and the straight line AC (displacement)
- Record and discuss the differences between the two measurements with peers

Why does a GPS device show a shorter distance to a destination than the actual road distance travelled?

- Humming Bird General Science Learner's Book pg. 269
- Tape measure, pegs, hammer
- Reference books
- Humming Bird General Science Learner's Book pg. 270
- Calculator

- Oral questions - Observation

Natural Physical Science

Linear Motion -Speed and velocity
Linear Motion -Practical determination of velocity

By the end of the lesson, the learner should be able to:
- Define speed and velocity and state their SI units
- Distinguish between speed and velocity
- Relate the difference between speed and velocity to real-life motion such as cars on a straight road and roundabouts

In groups, learners are guided to:
- Study pictures of cars in motion and discuss the difference between speed and velocity
- Discuss with peers why velocity requires direction while speed does not
- Write brief notes on the differences between speed and velocity

Why does a car moving at a constant speed around a roundabout have a changing velocity?

- Humming Bird General Science Learner's Book pg. 272
- Digital resources
- Reference books
- Tape measure, stopwatch, pegs
- Calculator

- Oral questions - Observation

Natural Physical Science

Linear Motion -Calculations on speed and velocity
Linear Motion -Acceleration
Linear Motion -Calculations on acceleration and deceleration
Linear Motion -Equations of motion (v = u + at)

By the end of the lesson, the learner should be able to:
- Calculate speed and velocity using appropriate formulae
- Solve numerical problems involving speed, distance and time
- Relate speed and velocity calculations to transport and athletics

In groups, learners are guided to:
- Solve numerical problems on speed and velocity using v = s/t
- Work through examples involving vehicles, runners and cyclists
- Discuss and compare solutions with peers

How does a bus company use average speed calculations to plan arrival times between towns?

- Humming Bird General Science Learner's Book pg. 272
- Calculator
- Reference books
- Humming Bird General Science Learner's Book pg. 274
- Digital resources
- Humming Bird General Science Learner's Book pg. 276

- Written assignments - Oral questions