Force and Energy

Forms of energy in nature
Forms of energy - Chemical and electrical energy
Forms of energy - Mechanical energy

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

- Define energy and state its SI unit
- Identify different forms of energy in nature
- Relate energy forms to everyday activities like cooking and lighting

In groups, learners are guided to:
- Discuss the meaning of energy and its SI unit
- Use textbooks and Internet to search for information on forms of energy
- Identify forms of energy found in the environment

What are the different forms of energy around us?

- Spotlight Integrated Science pg. 130
- Digital resources
- Internet access
- Batteries
- Electrical appliances
- Spotlight Integrated Science pg. 131
- Small stones
- Balls
- Working surface

- Oral questions - Observation - Written assignments

Force and Energy

Forms of energy - Heat, light and sound energy
Energy transformation - Introduction
Energy transformation - Potential to kinetic energy
Energy transformation - Chemical to heat and light energy
Energy transformation - Electrical to heat energy
Energy transformation - Kinetic to sound energy
Energy transformation - Chemical to electrical to light energy

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

- Describe heat, light and sound energy
- Identify sources of heat, light and sound energy
- Connect these energy forms to daily experiences like warming food and listening to music

In groups, learners are guided to:
- Discuss heat energy and its sources
- Explain light energy and how it is produced
- Describe sound energy and how vibrations produce it

How do we experience heat, light and sound energy daily?

- Spotlight Integrated Science pg. 132
- Candles
- Torches
- Musical instruments
- Digital resources
- Charts
- Spotlight Integrated Science pg. 133
- Small stones
- Working table
- Stopwatch
- Matchsticks
- Working surface
- Spotlight Integrated Science pg. 134
- Electric water heater
- Beaker
- Water
- Musical instruments
- Digital resources
- Cells
- Switch
- Wires
- Bulb

- Oral questions - Observation - Written questions

Force and Energy

Energy transformation - Using a pendulum
Energy transformation in appliances - Gas cylinder and electric cooker
Energy transformation in appliances - Generators and dynamos
Energy transformation in appliances - Solar panels and microphones

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

- Demonstrate energy transformation using a pendulum
- Explain the continuous transformation between potential and kinetic energy
- Connect pendulum motion to playground swings and clock mechanisms

In groups, learners are guided to:
- Set up a simple pendulum
- Observe and discuss energy transformation at different points
- Record the energy changes at points A, B and C

How does a pendulum demonstrate continuous energy transformation?

- Spotlight Integrated Science pg. 135
- String
- Bob
- Retort stand
- Spotlight Integrated Science pg. 138
- Charts showing appliances
- Digital resources
- Bicycle with dynamo
- Charts
- Digital resources
- Internet access

- Practical assessment - Observation - Oral questions

Force and Energy

Energy transformation in appliances - Electric heaters and LEDs
Safety measures - Road accidents and seat belts
Safety measures - Bright light and loud sounds

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

- Explain energy transformation in electric heaters
- Describe how light emitting diodes (LEDs) work
- Relate LEDs to energy-efficient lighting in homes and streets

In groups, learners are guided to:
- Study pictures of electric heaters and LED torches
- Discuss the energy transformations in each device
- Compare energy efficiency of different devices

Why are LED bulbs preferred for lighting?

- Spotlight Integrated Science pg. 140
- LED torch
- Electric heater
- Charts
- Spotlight Integrated Science pg. 141
- Charts on road safety
- Digital resources
- Spotlight Integrated Science pg. 142
- Sunglasses
- Earmuffs

- Oral questions - Observation - Written questions

Force and Energy

Safety measures - Fire and electrical accidents
Applications of energy transformation - Daily life examples
Applications of energy transformation - Poster making
Meaning of pressure - Introduction
Meaning of pressure - Formula and SI unit
Pressure in solids - Using toothpick and rubber

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

- Explain dangers of fire caused by energy transformation
- Describe safety measures when using electrical appliances
- Connect fire safety to kitchen and workshop practices

In groups, learners are guided to:
- Discuss accidents caused by fire and electricity
- Explain prevention and mitigation strategies
- Practice safety measures when lighting a gas cooker

What precautions should we take when using fire and electricity?

- Spotlight Integrated Science pg. 143
- Charts on fire safety
- Digital resources
- Spotlight Integrated Science pg. 144
- Charts
- Spotlight Integrated Science pg. 145
- Manila papers
- Markers
- Charts
- Spotlight Integrated Science pg. 147
- Different types of shoes
- Sandy surface
- Spotlight Integrated Science pg. 149
- Calculators
- Toothpicks
- Rubber
- Scissors

- Oral questions - Written assignments - Observation

Force and Energy

Pressure in solids - Using pin and softboard
Pressure in solids - Effect of force variation
Pressure in liquids - Using a tin can
Pressure in liquids - Using glass tubes and balloons
Pressure in liquids - Variation with density
Determining pressure in solids - Using wooden block and sand
Determining pressure - Calculating pressure of regular solids

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

- Demonstrate pressure using a pin and softboard
- Compare pressure exerted by sharp and blunt ends
- Relate this to pinning notices on boards

In groups, learners are guided to:
- Push the sharp end of a pin against a softboard
- Push the blunt end using the same force
- Discuss and record observations

How does surface area affect the pressure exerted by an object?

- Spotlight Integrated Science pg. 150
- Pins
- Softboard
- Carton box
- Pencils
- Sharpener
- Spotlight Integrated Science pg. 151
- Tall tin can
- Sellotape
- Nail and hammer
- Basin
- Spotlight Integrated Science pg. 152
- Glass tubes
- Balloons
- Tall glass vessel
- Spotlight Integrated Science pg. 158
- Tin can
- Water
- Brine (salt solution)
- Ruler
- Spotlight Integrated Science pg. 155
- Wooden block
- Basins with sand
- Spotlight Integrated Science pg. 156
- Regular wooden block
- Weighing machine

- Practical assessment - Observation - Written questions

Force and Energy

Determining pressure - Effect of weight on pressure
Pressure calculations - Problems on solids
Pressure calculations - More problems on solids
Pressure formula in liquids - Derivation and calculations
Applications of pressure in solids - Cutting tools and tyres
Applications of pressure in liquids - Dams, submarines and project

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

- Investigate how weight affects pressure
- Calculate pressure for stacked wooden blocks
- Relate this to stacking heavy loads safely

In groups, learners are guided to:
- Stack two wooden blocks together
- Calculate the pressure exerted compared to one block
- Discuss the relationship between weight and pressure

How does increasing the weight of an object affect the pressure it exerts?

- Spotlight Integrated Science pg. 157
- Wooden blocks
- Weighing machine
- Ruler
- Spotlight Integrated Science pg. 161
- Calculators
- Exercise books
- Spotlight Integrated Science pg. 162
- Charts
- Spotlight Integrated Science pg. 164
- Charts
- Calculators
- Spotlight Integrated Science pg. 167
- Cutting tools
- School bags
- Spotlight Integrated Science pg. 169
- Pictures of dams and submarines
- Materials for hand washing equipment

- Practical assessment - Written assignments - Observation