1) Teacher will make a KWL chart, students will tell what they know about the thunder, what they want to know about thunder, and after the lesson the students will tell me what they learned about thunder.
2) Teacher will start by asking:
- How does thunder happen?
- How does lightning help make the “boom” sound?
"In today’s lesson we will learn about thunder. We will do an experiment to help us understand what happens in the sky to make the “boom” sound. We will also discuss how lightning helps the thunder happen. We will be able to answer our objective questions, what exactly makes thunder, how cool and warm air mix to cause thunder, and how lightning helps makes the “boom” sound. We will make a KWL chart to help us keep in order of what we already know, what we want to know, and what we have learned."
Give each student a balloon and a thumbtack. Specifically tell them to not get the balloon anywhere near the thumbtack, because you will not be able to get another balloon. You will be able to pop the balloon with the thumbtack and I want you to see and feel what happens. After we have popped them, we will be able to talk about what we think happened and why we hear the sound.
Activity #1: What causes the pop sound when you pop the balloon? (While I have blown up the balloon hot air has gone into the balloon, after awhile it will cool down. When you stick the needle into the balloon you have cause all that pressure to explode and pop the balloon.) Discuss what you have observed.
When your lungs force air inside the balloon, the rubber stretches and the balloon inflates. When you make a tiny tear in the balloon, you are letting all that build up air inside the balloon. As the compressed air is now releasing and pushes out what causes the pop.
The quick expansion of the air pushes out against the surround balloon. This causes sound waves that get to your ears as a popping sound. Thunder is the same. As lightning strikes, it gives off heat through with it passes. This heated air will cool and contract. The fast expansion and contraction of air around lightning causes air molecules to move back and forth, which in turn produces sound waves that you hear as thunder.
Ways to stay safe during a thunderstorm: Stay away from windows, don’t get a shower, don’t use electronics (anything with metal), if you are outside do not stand under a tree try to find a safe building to get into.
We will talk about what you should do during a thunderstorm. We will go over one last time exactly what they learned and what else they have questions on.