HEAT AND ENERGY

Subject : 

Basic Science and Technology

Term :

Second Term

Week:

Week 4

Class :

Basic 5 / Primary 5

Previous lesson : 

The pupils have previous knowledge of  Domestic Animals that was taught as a topic during the last lessin

Topic :

Heat and Energy

Behavioural objectives :

At the end of lesson, pupils should be able to:

• develop a definition for energy
•  enumerate some forms of energy conversion such as electricity to heat (pressing iron), chemical to heat energy (kerosene), electric to mechanical (blender) etc
• discuss the importance of energy conversion

Instructional Materials:

• Wall charts
• Pictures
• Related Online Video
• Flash Cards
• Examples of energy conversion (e.g. solar panel, hydroelectric dam, battery)
• Chart paper and markers
• Textbooks
• Workbooks

Methods of Teaching :

• Class Discussion
• Group Discussion
• Asking Questions
• Explanation
• Role Modelling
• Role Delegation

Reference Materials :

• Scheme of Work
• Online Information
• Textbooks
• Workbooks
• 9 Year Basic Education Curriculum
• Workbooks

Content:

Energy is the ability to do work.

For example, when you ride a bike, your legs are using energy to pedal. When you turn on a light, the electricity running through the bulb is using energy to make the light shine. When a car drives down the road, the gas in the tank is using energy to power the engine.

All of these things are using energy to make something happen. And energy can be in many forms, like electricity, heat, light, and motion.

Energy Conversion

Energy can be converted from one form to another. Here are a few examples of energy conversion:

1. Electric to heat: When you press clothes with an iron, the electricity flowing through the iron heats up the metal plate, which in turn presses the clothes.
2. Chemical to heat: When you light a match, the chemical energy in the matchstick is converted into heat energy, which causes the match to burn and produce heat.
3. Electric to mechanical: When you use a blender, the electricity flowing through the motor is converted into mechanical energy, which causes the blades to spin and blend your food.
4. Solar to electric: Solar panels absorb the energy from the sun and convert it into electricity.
5. Chemical to electric: When you use a battery, the chemical energy stored in the battery is converted into electricity to power an electronic device.
6. Mechanical to electric: When we rotate a turbine in a hydroelectric dam, the turbine’s mechanical energy is converted into electricity.

Evaluation

1. What is energy defined as? a) The ability to do work b) The ability to move objects c) The ability to change shape
2. What is an example of energy being used to do work? a) Riding a bike b) Painting a picture c) Sitting down
3. What are some forms of energy? a) Electricity, heat, light, and motion b) Water, wind, and fire c) Food, air, and sleep
4. What is an example of energy being converted from one form to another? a) Using a flashlight b) Pressing clothes with an iron c) Playing a video game
5. What is an example of chemical energy being converted into heat energy? a) Burning a candle b) Charging a phone c) Playing a musical instrument
6. What is an example of electric energy being converted into mechanical energy? a) Using a blender b) Using a hairdryer c) Using a calculator
7. What is an example of solar energy being converted into electricity? a) Solar panels b) Wind turbines c) Hydroelectric dams
8. What is an example of chemical energy being converted into electricity? a) Batteries b) Gasoline c) Solar panels
9. What is an example of mechanical energy being converted into electricity? a) Hydroelectric dam b) Wind turbine c) Solar panel
10. What is the definition of energy? a) The ability to do work b) The ability to move c) The ability to change shape

Importance of Energy Conversion

Energy conversion is important because it allows us to use energy in different forms and for different purposes. Without energy conversion, we would not be able to harness the energy from natural resources like the sun, wind, and water, and use them to power our homes, buildings, and vehicles.

For example, solar panels convert energy from the sun into electricity, which can be used to power homes and buildings. Hydroelectric dams convert the energy of falling water into electricity, which can be used to power cities. These forms of energy conversion allow us to use renewable resources, reducing our dependence on fossil fuels and helping to protect the environment.

Energy conversion also allows us to use energy more efficiently. By converting one form of energy into another, we can use the energy in a way that is more useful for our needs. For example, electric energy can be converted into mechanical energy to power machines like cars and trains, making transportation more efficient.

Additionally, energy conversion is important for industrial and manufacturing processes. Many factories and industries require energy in different forms to power their machinery and processes, and energy conversion allows them to use energy in the most efficient and effective way.

In summary, energy conversion is important because it allows us to harness and use energy from natural resources, use energy more efficiently, and power industrial and manufacturing processes. This contributes to reducing dependence on fossil fuels and protecting the environment

Evaluation