Lesson on Sources of Light Energy for Primary 1

Hello, young learners! Welcome back to Primary 1 Basic Science & Technology. In our previous lesson, we learned about [link to previous lesson]. Today, we’re going to learn about Sources of Light Energy.

Objectives

By the end of this lesson, you should be able to:

• State the sources of light energy.
• Identify examples of natural and artificial sources of light.

Sources of Light Energy

What is light energy? Light energy is a form of energy that makes things visible. We can see things because light from a source reflects off of them and enters our eyes.

There are many different sources of light energy, and they can be divided into two main categories:

• Natural sources of light: These are sources of light that occur naturally in the environment. Some examples include:
  • The sun: The sun is the most important natural source of light. It provides us with light and heat.
  • Stars: Stars are giant balls of hot gas that emit light.
  • Fireflies: Fireflies are insects that produce light through a chemical reaction in their bodies.
  • Lightning: Lightning is a natural electrical discharge that produces a bright flash of light.
• Artificial sources of light: These are sources of light that are created by humans. Some examples include:
  • Light bulbs: Light bulbs are devices that produce light by passing electricity through a filament.
  • Candles: Candles produce light by burning wax.
  • Flashlights: Flashlights use batteries to power a bulb that emits light.
  • Luminous paint: Luminous paint absorbs light and then releases it slowly, making it glow in the dark.

Evaluation Questions

Now that you’ve learned about sources of light energy, let’s see if you can answer these questions:

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1. What are the two main categories of light sources?
2. Give two examples of natural sources of light.
3. Give two examples of artificial sources of light.
4. Why is the sun important to us?
5. How do fireflies produce light?

Conclusion

We’ve learned that light energy comes from different sources, both natural and artificial. The sun is the most important natural source of light, and it provides us with light and heat. We also learned about other sources of light, such as stars, fireflies, and lightning. Artificial sources of light, such as light bulbs, candles, and flashlights, are created by humans to provide light when the sun is not shining.

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!