Air has pressure??

From our weather unit - what do you know about AIR PRESSURE???

Did you know that air is pressing on us 14.7 pounds per square inch!!

Why aren't we being squished by the air around us?

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This diagram shows air molecules - what do you notice about this diagram?

Why do our ears pop - when we are driving up the pass or flying?


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Lets test it out...

1st- paper bag experiment 
2nd - ziplock bag, straw & text books. 

**********Don't forget your notebook!!!*************

video:

The Magic School Bus