1 / 19

What Do These Things Have In Common?

What Do These Things Have In Common?. These objects need air pressure to work!. What is Air Pressure?. What is your guess?. Air Pressure…. pushes on everything it touches! is all around you! BUT…… I don’t see it! I don’t feel it!. Air Pressure Pushes Down on Pig Pen!.

deepak
Download Presentation

What Do These Things Have In Common?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What Do These Things Have In Common? These objects need air pressure to work!

  2. What is Air Pressure? What is your guess?

  3. Air Pressure… • pushes on everything it touches! • is all around you! BUT…… • I don’t see it! • I don’t feel it!

  4. Air Pressure Pushes Down on Pig Pen!

  5. We Can Watch Air Pressure Work! Watch This!!

  6. What Just Happened? • What pushed the egg into the jar? • How strong is air pressure? • Why don’t we get squashed by air pressure?

  7. Here is what happened… 1. The matches warm the air in the bottle. When air is heated, it takes up more space, and it pushes against the sides of the bottle. 2. Some of the warm air tries to escape out of the bottle. 3. And when the matches go out, the air in the bottle becomes cooler. 4. The cooler air takes up less space. 5. Now, the air outside the bottle pushes with greater power than the air inside the bottle. 6. The greater pressure outside pushes the egg into the bottle!

  8. Air Pressure Doesn’t Squash You Because… You have air inside of you. It pushes out with the same amount of pressure that the outside air pushes in on you.

  9. Another reason air pressure doesn’t squash you is because… Air pushes in all directions!! Let’s try an experiment!

  10. Sometimes You Can Feel Air Pressure Change! Have your ears ever popped when you’ve gone up a mountain or up in an airplane? Do you know why?

  11. Air Pressure Changes Up here I have little weight on me. I feel little pressure. The higher you go, the less air pressure pushes. Your ears pop because they are trying to make the inside and outside pressure equal. Down here I have lots of weight on me. I feel high pressure.

  12. So…as you go up, the airin your ears pushes out. Oww, my ears!!

  13. Calvin & Hobbes are climbing to the top of a mountain. Will the air push against them more or less when they reach the top? Explain your answer.

  14. Answer: LessThe higher they go, the less air there is to push on them.

  15. This is what you do… • With your partner, make up a song about air pressure. • Write down the words on a piece of paper. • Sing your song for another group. • If you want, you can sing it for the class.

  16. …to be continued Find out how air pressure can make the weather be sunny or rainy! What’s your guess??!!

More Related