Hi, young learners! Welcome back to Primary 3 Basic Science & Technology. In our previous lesson, we learned about Soil – Types and Importance. Today, we’re going to learn about Air – Air in Motion.
Objectives
By the end of this lesson, you should be able to:
- Define wind and differentiate between wind and breeze.
- List two effects and the importance of wind.
- Describe how sound travels in the air.
- Use paper or a hand fan to show air in motion.
- Make and fly paper kites.
Air – Air in Motion
What is Wind?
Wind is the movement of air. It can be gentle or strong. A gentle wind is called a breeze.
Effects of Wind
Some of the effects of wind include:
- Blowing objects, such as leaves, dust, and paper.
- Making trees sway.
- Drying clothes.
Importance of Wind
The main importance of wind are:
- Spreading seeds, which helps plants grow.
- Helping birds and airplanes fly.
- Providing coolness on a hot day.
- Generating electricity using wind turbines.
Sound Traveling in Air
Sound travels in waves through the air, just like ripples in water. When you clap your hands, you create sound waves that travel through the air to your ears.
Evaluation Questions
Now that you’ve learned about air in motion, let’s see if you can answer these questions:
- What is wind, and how is it different from a breeze?
- Can you name two effects of wind?
- Why is wind important?
- How does sound travel in the air?
- What is one way to show air in motion?
Conclusion
Today, we’ve learned that wind is the movement of air, and it can have various effects and importance in our lives. We’ve also discovered that air is essential for us to hear sounds, and sound travels through the air in waves. Keep exploring the world around you and remember that air is all around us, even when we can’t see it! See you in the next lesson!
