Mixtures, Elements and Compounds

Physical and Chemical Changes - Properties of solids

By the end of the lesson, the learner should be able to:

- Describe the properties of solids
- Explain why solids have definite shape and volume
- Connect properties of solids to rigid objects like furniture and buildings

- Carry out activities to determine if solids have definite volume
- Discuss that particles in solids are closely packed and vibrate in fixed positions
- Record observations in Table 1.2

Why do solids have a definite shape?

- Spotlight Integrated Science Learner's Book pg. 1
- Small stone, string, measuring cylinder
- Water

- Practical assessment - Oral questions - Written assignments

Mixtures, Elements and Compounds

Physical and Chemical Changes - Density of solids
Physical and Chemical Changes - Density of irregularly shaped solids

By the end of the lesson, the learner should be able to:

- Define the term density
- Calculate density of regularly shaped solids
- Relate density to why some objects float and others sink in water

- Weigh wooden blocks and measure their dimensions
- Calculate volume using length × width × height
- Calculate density using mass/volume formula

How do you determine the density of a solid?

- Spotlight Integrated Science Learner's Book pg. 3
- Wooden blocks, ruler
- Weighing machine
- Spotlight Integrated Science Learner's Book pg. 4
- Eureka can, stone, string
- Measuring cylinder, weighing machine

- Calculations - Practical assessment - Written tests

Mixtures, Elements and Compounds

Physical and Chemical Changes - Shape and flow of solids

By the end of the lesson, the learner should be able to:

- Explain why solids have definite shape
- Demonstrate that solids do not flow
- Connect rigid shape of solids to structural materials like bricks and steel beams

- Transfer solids from one container to another and observe shape
- Place items at edge of table and observe ability to flow
- Discuss that particles in solids are in fixed positions

Why don't solids flow like liquids?

- Spotlight Integrated Science Learner's Book pg. 5
- Book, stone, pen, pencil
- Carton boxes, buckets

- Observation - Oral questions - Written assignments

Mixtures, Elements and Compounds

Physical and Chemical Changes - Compressibility of solids

By the end of the lesson, the learner should be able to:

- Demonstrate that solids are not easily compressed
- Explain why solids are not compressible
- Relate incompressibility of solids to hydraulic systems in vehicles

- Use syringe filled with sand to test compressibility
- Compare pressing plunger with empty barrel versus filled with sand
- Discuss that particles in solids are closely packed

Why can't we compress a solid easily?

- Spotlight Integrated Science Learner's Book pg. 6
- Syringe, sand
- Rubber cork

- Practical assessment - Oral questions - Observation

Mixtures, Elements and Compounds

Physical and Chemical Changes - Properties of liquids (density and volume)

By the end of the lesson, the learner should be able to:

- Demonstrate that liquids have density
- Show that liquids have definite volume
- Connect liquid properties to measuring cooking ingredients

- Determine density of water using beaker and weighing machine
- Transfer water between different containers to show definite volume
- Discuss arrangement of particles in liquids

Do liquids have definite volume?

- Spotlight Integrated Science Learner's Book pg. 8
- Beaker, measuring cylinder
- Volumetric flask, water

- Practical assessment - Calculations - Written tests

Mixtures, Elements and Compounds

Physical and Chemical Changes - Shape, flow and compressibility of liquids
Physical and Chemical Changes - Properties of gases

By the end of the lesson, the learner should be able to:

- Demonstrate that liquids take the shape of their container
- Show that liquids can flow but are not easily compressible
- Relate liquid properties to pouring water into different shaped bottles

- Transfer water between different shaped containers
- Use syringe to test compressibility of liquids
- Discuss that particles in liquids slide past one another

Why do liquids take the shape of their container?

- Spotlight Integrated Science Learner's Book pg. 10
- Beaker, conical flask
- Syringe, water
- Spotlight Integrated Science Learner's Book pg. 12
- Balloons, gas jars
- Syringe, string

- Practical assessment - Oral questions - Observation

Mixtures, Elements and Compounds

Physical and Chemical Changes - Comparing properties of solids, liquids and gases

By the end of the lesson, the learner should be able to:

- Compare properties of solids, liquids and gases
- Complete a table summarising properties of matter
- Apply knowledge of states of matter to everyday phenomena like weather

- Complete Table 1.3 comparing properties of matter
- Use digital media to search for videos on properties of different states of matter
- Discuss the arrangement and movement of particles in each state

How do the properties of solids, liquids and gases compare?

- Spotlight Integrated Science Learner's Book pg. 15
- Digital resources
- Reference materials

- Written tests - Oral questions - Table completion

Mixtures, Elements and Compounds

Physical and Chemical Changes - Demonstrating diffusion in liquids

By the end of the lesson, the learner should be able to:

- Define the term diffusion
- Demonstrate diffusion using potassium manganate (VII) and water
- Relate diffusion to how tea colour spreads in hot water

- Set up apparatus with straw, beaker and potassium manganate (VII) crystal
- Observe the purple colour spreading through water
- Discuss that diffusion is movement from high to low concentration

How does diffusion occur in liquids?

- Spotlight Integrated Science Learner's Book pg. 16
- Beaker, straw
- Potassium manganate (VII), water

- Practical assessment - Observation - Oral questions

Mixtures, Elements and Compounds

Physical and Chemical Changes - Distinguishing temporary and permanent changes

By the end of the lesson, the learner should be able to:

- Define temporary and permanent changes
- Distinguish between temporary and permanent changes using examples
- Identify temporary changes like melting ice and permanent changes like burning paper

- Study pictures showing changes in substances before and after
- Discuss characteristics of temporary changes (reversible, no new substance)
- Discuss characteristics of permanent changes (irreversible, new substance formed)

What is the difference between a temporary and a permanent change?

- Spotlight Integrated Science Learner's Book pg. 18
- Pictures of changes in substances
- Reference materials

- Oral questions - Written assignments - Observation

Mixtures, Elements and Compounds

Physical and Chemical Changes - Temporary changes in water and candle wax

By the end of the lesson, the learner should be able to:

- Demonstrate temporary changes by heating water and candle wax
- Explain why these changes are reversible
- Connect temporary changes to everyday processes like boiling water for cooking

- Heat water in a conical flask and observe
- Heat candle wax in a test tube and allow to cool
- Record observations in Table 1.5

Why is melting candle wax a temporary change?

- Spotlight Integrated Science Learner's Book pg. 20
- Conical flask, test tubes
- Water, candle wax, heat source

- Practical assessment - Oral questions - Written tests

Mixtures, Elements and Compounds

Physical and Chemical Changes - Temporary changes in zinc oxide and iodine
Physical and Chemical Changes - Temporary chemical changes in copper (II) sulphate

By the end of the lesson, the learner should be able to:

- Demonstrate temporary changes by heating zinc oxide and iodine
- Observe colour changes on heating and cooling
- Relate sublimation of iodine to how mothballs disappear

- Heat zinc oxide and observe colour change
- Heat iodine crystals and observe sublimation
- Discuss characteristics of temporary (physical) changes

What happens when zinc oxide and iodine are heated?

- Spotlight Integrated Science Learner's Book pg. 20
- Test tubes, boiling tube
- Zinc oxide, iodine, heat source
- Spotlight Integrated Science Learner's Book pg. 22
- Boiling tubes, delivery tube
- Copper (II) sulphate, heat source

- Practical assessment - Observation - Written assignments

Mixtures, Elements and Compounds

Physical and Chemical Changes - Temporary chemical changes in cobalt (II) chloride

By the end of the lesson, the learner should be able to:

- Demonstrate temporary chemical change using hydrated cobalt (II) chloride
- Observe colour change from pink to blue on heating
- Use cobalt chloride paper to test for moisture in weather forecasting

- Heat cobalt (II) chloride crystals
- Observe colour change from pink to blue
- Add water to anhydrous cobalt (II) chloride and observe colour change back to pink

Why does cobalt (II) chloride change colour when heated?

- Spotlight Integrated Science Learner's Book pg. 24
- Boiling tubes
- Cobalt (II) chloride, heat source

- Practical assessment - Observation - Written assignments

Mixtures, Elements and Compounds

Physical and Chemical Changes - Permanent changes in potassium manganate (VII)

By the end of the lesson, the learner should be able to:

- Demonstrate permanent change by heating potassium manganate (VII)
- Test for oxygen gas produced using a glowing splint
- Relate thermal decomposition to industrial production of oxygen

- Heat potassium manganate (VII) in a boiling tube
- Insert glowing wooden splint to test for oxygen
- Write word equation for the reaction

What products are formed when potassium manganate (VII) is heated?

- Spotlight Integrated Science Learner's Book pg. 26
- Boiling tube, test tube holder
- Potassium manganate (VII), wooden splints

- Practical assessment - Oral questions - Written tests

Mixtures, Elements and Compounds

Physical and Chemical Changes - Permanent changes in copper (II) nitrate

By the end of the lesson, the learner should be able to:

- Demonstrate permanent change by heating copper (II) nitrate
- Identify products formed from the reaction
- Understand irreversible reactions in manufacturing processes

- Heat copper (II) nitrate in a boiling tube (in fume chamber)
- Observe formation of black solid and brown gas
- Write word equation for the reaction

What makes the change in copper (II) nitrate permanent?

- Spotlight Integrated Science Learner's Book pg. 27
- Boiling tubes, test tube holder
- Copper (II) nitrate, heat source

- Practical assessment - Observation - Written assignments

Mixtures, Elements and Compounds

Physical and Chemical Changes - Applications in making candles and ice
Physical and Chemical Changes - Applications in food preservation and ice cream making

By the end of the lesson, the learner should be able to:

- Explain applications of change of state of matter
- Describe how candles and ice cubes are made
- Apply knowledge to recycling candle wax at home

- Discuss how solid wax changes to liquid and back to solid in candle making
- Discuss how water changes to ice in freezer
- Carry out further activity on making ice cubes

How is change of state of matter applied in making candles?

- Spotlight Integrated Science Learner's Book pg. 28
- Used candles, sufuria
- Glass tumbler, wick
- Spotlight Integrated Science Learner's Book pg. 31
- Pictures of refrigerator, ice cream
- Digital resources

- Practical assessment - Oral questions - Project work

Mixtures, Elements and Compounds

Physical and Chemical Changes - Other applications of change of state

By the end of the lesson, the learner should be able to:

- Explain use of mothballs and gel air fresheners
- Describe applications in drying clothes and melting snow on roads
- Connect sublimation to disappearance of mothballs in wardrobes

- Discuss how mothballs change from solid to gas (sublimation)
- Discuss how gel air fresheners work
- Discuss how salt is used to melt snow on roads
- Design placard with information on change of state of matter

What other applications of change of state exist in daily life?

- Spotlight Integrated Science Learner's Book pg. 31
- Mothballs, air freshener
- Manila paper, markers

- Oral questions - Written tests - Project work

Mixtures, Elements and Compounds

Physical and Chemical Changes - Characteristics of particles in three states

By the end of the lesson, the learner should be able to:

- Describe characteristics of particles in solids, liquids and gases
- Explain movement of particles in different states
- Relate particle behaviour to observable properties like shape and volume

- Carry out activities to demonstrate characteristics of particles
- Perform experiments to demonstrate diffusion in liquids and gases
- Use digital media to search for information on movement of particles

How does movement of particles in matter affect its properties?

- Spotlight Integrated Science Learner's Book pg. 1
- Ink, water, beaker
- Digital resources

- Oral questions - Practical assessment - Written assignments

Mixtures, Elements and Compounds
Living Things and their Environment

Physical and Chemical Changes - Determining boiling and melting points
The Cell - The light microscope

By the end of the lesson, the learner should be able to:

- Describe the heating curve
- Explain effects of impurities on boiling and melting points
- Relate addition of salt to water when cooking to lowering boiling time

- Carry out experiments to determine boiling and melting points of pure substances
- Draw the heating curve and discuss the trends
- Discuss that impurities raise boiling point and lower melting point

How do impurities affect boiling and melting points?

- Spotlight Integrated Science Learner's Book pg. 1
- Thermometer, beaker
- Heat source, pure and impure substances
- Spotlight Integrated Science Learner's Book Grade 8 pg. 82
- Light microscope
- Charts showing parts of a microscope
- Digital devices

- Practical assessment - Oral questions - Written tests

Living Things and their Environment

The Cell - Functions of microscope parts
The Cell - Use and care for a light microscope
The Cell - Using the light microscope

By the end of the lesson, the learner should be able to:

- Describe the functions of the eyepiece lens, objective lenses, and revolving nosepiece
- Explain the role of adjustment knobs in focusing
- Connect microscope functions to medical laboratory work

- Complete a table matching microscope parts to their functions
- Discuss functions of eyepiece, objective lenses, and nosepiece
- Role-play as laboratory technicians identifying microscope parts

How do the different parts of a microscope work together to magnify specimens?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 84
- Light microscope
- Function charts
- Digital devices
- Spotlight Integrated Science Learner's Book Grade 8 pg. 86
- Lens paper
- Microscope cover
- Spotlight Integrated Science Learner's Book Grade 8 pg. 87
- Transparent paper with writings
- Glass slides

- Written assignments - Oral questions - Peer assessment

Living Things and their Environment

The Cell - Preparing plant cell specimens
The Cell - Observing plant cells

By the end of the lesson, the learner should be able to:

- Prepare a temporary slide of onion epidermal cells
- Mount specimens correctly on glass slides
- Apply careful techniques used in biological research

- Peel epidermis from onion using forceps
- Place drop of water on glass slide
- Spread epidermis on the water drop
- Lower cover slip gently to avoid air bubbles

How do we prepare plant cells for observation under a microscope?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 89
- Onion bulb
- Glass slides and cover slips
- Distilled water
- Forceps, scalpel, mounted needle
- Spotlight Integrated Science Learner's Book Grade 8 pg. 90
- Light microscope
- Prepared onion slides
- Iodine solution
- Droppers

- Practical assessment - Observation - Slide preparation quality

Living Things and their Environment

The Cell - Components of a plant cell
The Cell - Observing animal cells
The Cell - Making animal cell models

By the end of the lesson, the learner should be able to:

- Identify components of a plant cell seen under a light microscope
- Draw and label a plant cell diagram
- Connect plant cell structures to how plants make food and stay rigid

- Study charts showing plant cell components
- Identify cell wall, cell membrane, cytoplasm, nucleus, vacuole, chloroplasts
- Make a model of a plant cell using carton box and manila paper
- Label components on the model

What are the components of a plant cell as seen under a light microscope?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 91
- Plant cell charts
- Carton box, manila paper
- Pencil colours
- Scissors, glue
- Spotlight Integrated Science Learner's Book Grade 8 pg. 93
- Light microscope
- Permanent slides of animal cells
- Lens paper
- Charts
- Spotlight Integrated Science Learner's Book Grade 8 pg. 94
- Carton box
- Manila papers
- Scissors, glue, scalpel

- Model assessment - Labelling accuracy - Oral questions

Living Things and their Environment

The Cell - Functions of cell components

By the end of the lesson, the learner should be able to:

- State the functions of cell membrane, cytoplasm, and nucleus
- Explain the role of chloroplasts and cell wall in plant cells
- Connect cell functions to everyday processes like digestion and energy production

- Read reference materials on functions of cell components
- Complete crossword puzzle identifying components by their functions
- Discuss how cell membrane controls movement of materials
- Search the Internet for animations on cell functions

What are the functions of the components of a cell?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 95
- Digital devices
- Reference books
- Crossword puzzle worksheets

- Written assignments - Oral questions - Crossword completion

Living Things and their Environment

The Cell - Functions of vacuole and tonoplast

By the end of the lesson, the learner should be able to:

- Describe the functions of the vacuole and tonoplast
- Explain how the vacuole stores cell sap
- Relate vacuole functions to why fruits are juicy and plants stay upright

- Discuss the role of vacuole in storing cell sap
- Explain how tonoplast regulates movement between vacuole and cytoplasm
- Draw diagrams showing vacuole position in plant cells
- Compare vacuole size in plant and animal cells

Why is the vacuole important in plant cells?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 96
- Plant cell diagrams
- Digital devices
- Reference materials

- Oral questions - Written assignments - Diagram labelling

Living Things and their Environment

The Cell - Similarities between plant and animal cells

By the end of the lesson, the learner should be able to:

- Identify similarities between plant and animal cells
- List components found in both cell types
- Recognise that all living things share common cellular features

- Compare models of plant and animal cells made earlier
- Use charts to identify common components
- List cell membrane, cytoplasm, and nucleus as shared components
- Discuss why both cells need these components

What do plant and animal cells have in common?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 97
- Plant and animal cell models
- Comparison charts
- Digital devices

- Oral questions - Written comparison - Group presentation

Living Things and their Environment

The Cell - Differences between plant and animal cells

By the end of the lesson, the learner should be able to:

- Identify differences between plant and animal cells
- Explain why plant cells have cell walls and chloroplasts
- Connect cell differences to why plants can make food while animals cannot

- Study charts comparing plant and animal cells
- Complete a table showing differences in cell wall, chloroplasts, and vacuole
- Discuss why plants have chloroplasts for photosynthesis
- Present findings to classmates

Why do plant cells have structures that animal cells lack?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 98
- Comparison charts
- Reference books
- Digital devices

- Table completion - Oral presentation - Written test

Living Things and their Environment

The Cell - Meaning of magnification
The Cell - Calculating magnification

By the end of the lesson, the learner should be able to:

- Define the term magnification
- Explain how microscopes enlarge images of specimens
- Relate magnification to how doctors examine blood samples for malaria

- Study pictures showing original and magnified images
- Discuss the meaning of magnification
- Explain that magnification makes cells appear larger without changing physical size
- Use digital devices to watch videos on magnification

What is magnification and why is it important?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 99
- Magnification pictures
- Digital devices
- Light microscope
- Spotlight Integrated Science Learner's Book Grade 8 pg. 100
- Light microscope
- Exercise books
- Calculators

- Oral questions - Written definition - Observation

Living Things and their Environment

The Cell - Solving magnification problems

By the end of the lesson, the learner should be able to:

- Solve numerical problems on magnification
- Determine objective lens magnification when total magnification is given
- Use problem-solving skills applicable in scientific research

- Calculate magnification power of objective lens given total magnification and eyepiece power
- Work through sample problems as a class
- Complete individual practice problems
- Check answers with peers

How can we determine unknown magnification values?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 100
- Problem worksheets
- Calculators
- Exercise books

- Written problems - Peer marking - Teacher assessment

Living Things and their Environment

The Cell - Uses of light microscope in healthcare

By the end of the lesson, the learner should be able to:

- Explain uses of the light microscope in healthcare
- Describe how microscopes help identify diseases
- Relate microscope use to hospital laboratory work and disease diagnosis

- Discuss how scientists use microscopes to study micro-organisms
- Explain how laboratory professionals identify diseases using microscopes
- Search the Internet for information on microscope uses in medicine
- Write notes on healthcare applications

How do light microscopes contribute to healthcare?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 101
- Digital devices
- Reference books
- Healthcare posters

- Written notes - Oral presentation - Research assessment

Living Things and their Environment

The Cell - Uses of light microscope in research and industry

By the end of the lesson, the learner should be able to:

- Explain uses of the light microscope in research and industry
- Describe how microscopes are used in forensic science
- Connect microscope applications to career opportunities in science

- Discuss use of microscopes in forensic science and agriculture
- Explain how microscopes help quality control in industries
- Watch videos on various applications of microscopes
- Complete self-assessment on the cell sub-strand

How are light microscopes used in research and industry?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 102
- Digital devices
- Reference materials
- Assessment worksheets

- Self-assessment - Written test - Oral questions

Living Things and their Environment

The Cell - End of sub-strand assessment
Structure of the cell membrane
Properties of the cell membrane

By the end of the lesson, the learner should be able to:

- Complete assessment on The Cell sub-strand
- Demonstrate understanding of cell components and their functions
- Show confidence in applying cell knowledge

- Complete written assessment on cells
- Draw and label plant and animal cells
- Calculate magnification problems
- Receive feedback and corrections

How well have we understood the concepts of the cell?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 103
- Assessment papers
- Drawing materials
- Exercise books
- Spotlight Integrated Science Learner's Book Grade 8 pg. 104
- Liquid soap, water, sugar
- Straws, cotton thread
- Shallow tray
- Spotlight Integrated Science Learner's Book Grade 8 pg. 107
- Cell membrane diagrams
- Digital devices
- Reference books

- End of topic test - Drawing assessment - Calculation test

Living Things and their Environment

Effects of heat on cell membrane - Potato experiment
Effects of heat on cell membrane - Beetroot experiment

By the end of the lesson, the learner should be able to:

- Investigate the effect of heat on cell membrane using potato
- Compare responses of boiled and raw potato to sugar solution
- Connect heat damage to membranes with how cooking changes food texture

- Bore cylindrical holes in raw and boiled potatoes
- Add concentrated sugar solution to hollow chambers
- Place potatoes in petri dishes with water
- Observe and record changes after one hour

How does heat affect the cell membrane?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 108
- Potatoes, cork borer
- Concentrated sugar solution
- Beakers, petri dishes
- Spotlight Integrated Science Learner's Book Grade 8 pg. 109
- Beetroot, cork borer
- Water baths, thermometers
- Boiling tubes, test tube rack

- Practical report - Observation - Written questions

Living Things and their Environment

Effects of dilute acids and alkalis on cell membrane
Demonstrating diffusion using perfume
Role of diffusion in gaseous exchange

By the end of the lesson, the learner should be able to:

- Investigate effects of dilute acids and alkalis on cell membrane
- Relate concentration to amount of pigment released
- Connect to why strong cleaning chemicals damage skin

- Prepare test tubes with different concentrations of dilute HCl
- Add beetroot cores to each test tube
- Observe colour intensity after one hour
- Repeat experiment using dilute sodium hydroxide

How do acids and alkalis affect the cell membrane?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 111
- Beetroot cores
- Dilute HCl, dilute NaOH
- Test tubes, syringes
- Spotlight Integrated Science Learner's Book Grade 8 pg. 113
- Perfume or deodorant spray
- Stopwatch
- Notebooks
- Spotlight Integrated Science Learner's Book Grade 8 pg. 114
- Gaseous exchange diagrams
- Digital devices
- Reference books

- Practical report - Observation - Written analysis

Living Things and their Environment

Role of diffusion in absorption and plants
Factors affecting diffusion

By the end of the lesson, the learner should be able to:

- Explain the role of diffusion in absorption of digested food
- Describe diffusion in plants for gaseous exchange and mineral absorption
- Relate to how plants absorb nutrients from fertilisers

- Discuss absorption of glucose from small intestine into blood
- Explain how plants take in carbon dioxide through stomata
- Describe how root hair cells absorb mineral salts by diffusion
- Search the Internet for videos on diffusion in plants

How do living things use diffusion for nutrition?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 115
- Plant diagrams
- Digital devices
- Reference materials
- Spotlight Integrated Science Learner's Book Grade 8 pg. 116
- Reference books
- Charts

- Written summary - Oral presentation - Observation

Living Things and their Environment

Demonstrating osmosis using visking tubing

By the end of the lesson, the learner should be able to:

- Define osmosis
- Demonstrate osmosis using visking tubing
- Connect osmosis to how dried fruits swell when soaked in water

- Tie one end of visking tubing and fill with concentrated sugar solution
- Immerse the tubing in a beaker of distilled water
- Observe changes after thirty minutes
- Explain movement of water molecules through the membrane

How do water molecules move through a semi-permeable membrane?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 118
- Visking tubing
- Concentrated sugar solution
- Distilled water, beaker

- Practical report - Observation - Written explanation

Living Things and their Environment

Demonstrating osmosis using Irish potato

By the end of the lesson, the learner should be able to:

- Investigate osmosis using potato cores
- Measure changes in length of potato cores in different solutions
- Relate to why vegetables become crisp in water and soft in salt

- Obtain six potato cores of equal length (50mm)
- Place three cores in distilled water and three in concentrated sugar solution
- Measure length after forty minutes
- Record and compare changes in length

What happens to plant cells in different solutions?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 120
- Irish potatoes, cork borer
- Distilled water
- Concentrated sugar solution
- Ruler, boiling tubes

- Data recording - Measurement accuracy - Written analysis

Living Things and their Environment

Demonstrating osmosis using banana peel strips
Factors affecting osmosis

By the end of the lesson, the learner should be able to:

- Demonstrate osmosis using banana peel strips
- Explain why strips curve differently in different solutions
- Connect to why pickled vegetables shrink and fresh ones stay firm

- Prepare thin strips from raw green banana peel
- Place strips in distilled water and concentrated salt solution
- Observe curving direction after thirty minutes
- Explain why inner cells gain or lose water

Why do banana peel strips curve in different directions?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 121
- Raw green banana peel
- Distilled water
- Concentrated salt solution
- Beakers, scalpel
- Spotlight Integrated Science Learner's Book Grade 8 pg. 123
- Digital devices
- Reference books
- Charts

- Practical observation - Drawing - Written explanation

Living Things and their Environment

Role of osmosis in water absorption and stomata

By the end of the lesson, the learner should be able to:

- Explain the role of osmosis in water absorption by roots
- Describe how osmosis controls opening and closing of stomata
- Connect to why watering plants makes them stand upright

- Discuss how root hair cells absorb water from soil by osmosis
- Explain water distribution from cell to cell in plants
- Describe how guard cells control stomata through osmosis
- Complete table on roles of osmosis

How do plants use osmosis for survival?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 124
- Plant diagrams
- Digital devices
- Reference materials

- Table completion - Oral questions - Written notes

Living Things and their Environment

Role of osmosis in osmoregulation and plant support

By the end of the lesson, the learner should be able to:

- Explain the role of osmosis in osmoregulation in the kidney
- Describe how osmosis provides support in plants
- Relate to why kidneys filter blood and plants droop without water

- Discuss how kidneys use osmosis to filter blood
- Observe plant leaves at different times of day
- Explain wilting and turgidity in plants
- Discuss feeding mechanism of insectivorous plants

How does osmosis help regulate water in living things?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 125
- Young plants
- Digital devices
- Reference books

- Observation records - Written explanation - Oral questions

Living Things and their Environment

Importance of diffusion and osmosis
Introduction to the menstrual cycle

By the end of the lesson, the learner should be able to:

- Explain the importance of diffusion and osmosis in living things
- Summarise how these processes support life
- Connect to everyday processes like breathing, eating, and plant growth

- Watch videos on gaseous exchange in human lungs
- Discuss importance of diffusion in breathing and nutrition
- Discuss importance of osmosis in water balance
- Complete assessment activity on the sub-strand

Why are diffusion and osmosis important for life?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 126
- Digital devices
- Assessment worksheets
- Reference materials
- Spotlight Integrated Science Learner's Book Grade 8
- Reference books
- Charts on menstrual cycle

- Self-assessment - Written test - Oral presentation

Living Things and their Environment

Phases of the menstrual cycle
Ovulation and luteal phase
Irregular periods and bleeding

By the end of the lesson, the learner should be able to:

- Describe the phases of the menstrual cycle
- Explain what happens during menstruation phase
- Understand that cycle phases are natural body rhythms like sleep patterns

- Study diagrams showing phases of the menstrual cycle
- Discuss the menstruation phase (days 1-5)
- Explain the follicular phase and its characteristics
- Record notes on each phase

What are the different phases of the menstrual cycle?

- Spotlight Integrated Science Learner's Book Grade 8
- Menstrual cycle diagrams
- Digital devices
- Charts
- Ovulation charts
- Reference materials
- Reference books
- Health education materials

- Diagram labelling - Written notes - Oral questions

Living Things and their Environment

Menstrual pain and discomfort
Managing menstrual cycle challenges

By the end of the lesson, the learner should be able to:

- Describe menstrual pain and its causes
- Explain other discomforts associated with menstruation
- Know that menstrual discomfort is manageable and not a barrier to daily activities

- Discuss menstrual cramps and their causes
- Explain other symptoms like bloating and mood changes
- Discuss how pain affects daily activities
- Write notes on managing menstrual discomfort

Why do some people experience pain during menstruation?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education charts
- Digital devices
- Reference materials
- Health education materials
- Planning worksheets

- Written notes - Oral questions - Class discussion

Living Things and their Environment

Menstrual hygiene management
The male reproductive cells

By the end of the lesson, the learner should be able to:

- Explain the importance of menstrual hygiene
- Describe proper use of sanitary products
- Practice good hygiene for health and confidence

- Discuss importance of menstrual hygiene
- Explain proper use and disposal of sanitary pads
- Discuss alternative menstrual products
- Emphasise regular changing and cleanliness

Why is menstrual hygiene important?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Sanitary products samples
- Digital devices
- Sperm cell diagrams
- Digital devices
- Reference books

- Oral questions - Written notes - Demonstration

Living Things and their Environment

The female reproductive cell
The process of fertilisation

By the end of the lesson, the learner should be able to:

- Describe the structure of an egg cell (ovum)
- Explain the function of the egg in reproduction
- Recognise that the egg provides nutrients for early embryo development

- Study diagrams of egg cells
- Identify parts: cell membrane, cytoplasm, nucleus
- Compare size of egg to sperm
- Discuss how the egg is released during ovulation

What is the structure and function of the egg cell?

- Spotlight Integrated Science Learner's Book Grade 8
- Egg cell diagrams
- Digital devices
- Reference materials
- Fertilisation diagrams
- Charts

- Diagram labelling - Written notes - Oral questions

Living Things and their Environment

Cell division after fertilisation

By the end of the lesson, the learner should be able to:

- Describe what happens after fertilisation
- Explain how the zygote divides to form a blastocyst
- Connect cell division to how a single cell becomes a complete human

- Study diagrams showing cell division after fertilisation
- Explain how zygote divides into 2, 4, 8 cells and more
- Describe formation of blastocyst
- Discuss journey of blastocyst to the uterus

What happens to the zygote after fertilisation?

- Spotlight Integrated Science Learner's Book Grade 8
- Cell division diagrams
- Digital devices
- Reference books

- Diagram sequencing - Oral questions - Written notes

Living Things and their Environment

Implantation

By the end of the lesson, the learner should be able to:

- Describe the process of implantation
- Explain how the blastocyst attaches to the uterus wall
- Understand that successful implantation marks the beginning of pregnancy

- Study illustrations showing implantation
- Explain how blastocyst embeds in uterine wall
- Discuss importance of the thickened uterine lining
- Describe what happens if implantation does not occur

How does the blastocyst implant in the uterus?

- Spotlight Integrated Science Learner's Book Grade 8
- Implantation diagrams
- Digital devices
- Charts

- Diagram labelling - Written explanation - Oral questions

Living Things and their Environment

Introduction to STIs

By the end of the lesson, the learner should be able to:

- Define sexually transmitted infections (STIs)
- List common STIs
- Recognise that STIs are preventable health conditions

- Search for information on STIs from print and non-print materials
- Define STIs and explain how they spread
- List common STIs: HIV/AIDS, gonorrhea, syphilis, herpes
- Discuss importance of STI awareness

What are sexually transmitted infections?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Reference books

- Oral questions - Written notes - Group discussion

Living Things and their Environment

Symptoms of HIV/AIDS
Symptoms of gonorrhea, syphilis, and herpes

By the end of the lesson, the learner should be able to:

- Outline symptoms of HIV/AIDS
- Explain the difference between HIV and AIDS
- Know that early testing and treatment help people with HIV live healthy lives

- Search for information on HIV/AIDS symptoms
- Discuss initial symptoms: fever, fatigue, swollen lymph nodes
- Explain progression to AIDS if untreated
- Discuss importance of testing and treatment

What are the symptoms of HIV/AIDS?

- Spotlight Integrated Science Learner's Book Grade 8
- HIV/AIDS education materials
- Digital devices
- Charts
- Health education materials
- Reference books

- Written notes - Oral questions - Class discussion

Living Things and their Environment

Prevention of STIs - Abstinence and faithfulness

By the end of the lesson, the learner should be able to:

- Explain prevention measures for STIs
- Describe abstinence and faithfulness as prevention methods
- Make informed decisions about personal health and relationships

- Discuss abstinence as the most effective prevention method
- Explain being faithful to one uninfected partner
- Discuss importance of knowing partner's STI status
- Write notes on prevention strategies

How can STIs be prevented?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Prevention posters

- Oral questions - Written notes - Class discussion

Living Things and their Environment

Prevention of STIs - Other measures

By the end of the lesson, the learner should be able to:

- Describe additional STI prevention measures
- Explain the importance of regular health check-ups
- Take responsibility for personal health decisions

- Discuss proper use of protection during intercourse
- Explain importance of regular STI testing
- Discuss avoiding sharing needles and sharp objects
- Emphasise seeking immediate treatment if infected

What other measures help prevent STIs?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Reference books

- Written notes - Oral questions - Group discussion