Hi, young learners! Welcome back to Primary 3 Basic Science and Technology. In our previous lesson, we learned about Chemical Energy – Definition. Today, we’re going to learn about Energy.
Objectives
By the end of this lesson, you should be able to:
- Identify and explain two uses of chemical energy.
- Develop an appreciation for the role of chemical energy in daily life.
- Demonstrate the process of a simple chemical reaction.
- Collaborate in discussing and sharing ideas about chemical energy.
Uses Of Chemical Energy
Chemical energy is a type of energy stored in the bonds of molecules. When these bonds are broken, energy is released, which can be used to do work.
What is Chemical Energy?
Chemical energy is stored in the bonds of molecules. When these bonds are broken, energy is released, which can be used to do work. For example, when you burn wood, the chemical bonds in the wood are broken, releasing heat and light energy.
Some of the major uses of chemical energy include:
- Heating our homes: Chemical energy is released when we burn fuels like natural gas, propane, and oil to heat our homes.
- Cooking food: Chemical energy is released when we burn fuels like gas or electricity to cook food.
- Running vehicles: Chemical energy is stored in fuels like gasoline and diesel, which is released when the fuel is burned in the engine to power the vehicle.
- Generating electricity: Chemical energy is released when we burn fuels like coal, natural gas, and oil to generate electricity.
- Producing light: Chemical energy is released when we burn fuels like kerosene and propane to produce light.
Examples of chemical energy in action:
- Batteries: Batteries store chemical energy that is released as electrical energy when the battery is used.
- Food: Food contains chemical energy that our bodies use to function.
- Explosives: Explosives contain chemical energy that is released in a rapid and violent reaction.
Evaluation Questions
Now that you’ve learned about chemical energy, let’s see if you can answer these questions:
- Name two uses of chemical energy mentioned in class.
- Explain a simple chemical reaction you observed during the demonstration.
- What are some examples of chemical energy in action?
- How is chemical energy used to generate electricity?
- Why is chemical energy important in our daily lives?
Conclusions or Summary
We learned that chemical energy is a type of energy stored in the bonds of molecules. When these bonds are broken, energy is released, which can be used to do work. We also learned about some of the major uses of chemical energy, such as heating our homes, cooking food, running vehicles, generating electricity, and producing light.
Don’t forget to check the comments section if you have any questions, and use the navigation to move to the next lesson. See you in the next lesson!
