Wind Pump

Use a bicycle pump to show how air pressure makes wind.  When you push down on the pump, the air pressure inside the pump is greater than the air pressure outside the pump.  So the air flows from the high pressure inside the pump to the lower pressure outside.  The harder you pump (or the greater the difference in air pressure), the faster the air blows out. 

How Cold Do You Feel?

Wind makes you feel cooler, because it causes your body to lose heat faster.  The stronger the wind, the more heat is lost, and the colder you feel.  Below is a brand new table so you can figure out what temperature your body feels, called the Wind Chill temperature.

 windchill chart

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