| Lesson start ideas | Give a creative idea how to begin a lesson |
| Which subject | Physics |
| What age group | Year or Grade 8 |
| What topic | Pressure |
| Quantity | 1 |
| Any other preferences |
In this lesson, we will learn about Pressure - the force exerted by a fluid on an object. Specifically, we will learn how Pressure is related to everyday activities such as popping a balloon.
Let's start by imagining that you are at a party and there are a bunch of balloons around. You notice that some of the balloons are not fully inflated and look weak, while others are fully inflated and look strong. You wonder what would happen if you were to pop each balloon.
Before we actually pop the balloons, let's brainstorm what could happen when you pop a balloon. Write down your ideas in the space below.
Now that we have some ideas, let's talk about what's actually happening when we pop a balloon. When you blow up a balloon, the air inside exerts pressure on the walls of the balloon. The more air you blow into the balloon, the more it stretches and the greater the pressure inside. When you pop the balloon, the air suddenly rushes out, causing the balloon to burst. This happens because the pressure inside the balloon is greater than the pressure outside, causing the balloon to explode.
Let's take a closer look at this concept. Imagine you have two balloons, one that is fully inflated and another that is only partially inflated. If you pop both balloons, which one do you think will make a louder noise? Why? Discuss with a partner and write down your thoughts below.
To wrap up this lesson, let's see how much we've learned. Complete the quiz below.
Congratulations! You've just learned about Pressure and its application in everyday life.