Changing Air PressureCreated by S. Falwell, permission granted for teachers to use if they include a link to http://comelearnmore.com/

What do you think?(answer on in your Interactive Notebook)

1. Which has more mass: a box filled with air or a box filled with water?

2. Which has more mass: a box filled with warm air or a box filled with cold air?

Continued…

3. Draw what you think the molecules of air in the box of warm air and the box of cold air would look like if they were big enough to see.

(I’m interested in how the molecules might look different at two different temperatures.)

Continued…

Warm Air Cold Air

4. Why does wood float in water while a rock sinks?

5. How do you get a heavy boat to float?

…end of “What do you think?” questionsImage from http://indexofwallpapers.com/aircraft-carrier-wallpapers/aircraft-carrier-wallpaper-3.html

Watch these videos and see if you can use the term “air pressure” to explain WHY…

•Egg in a bottle http://www.youtube.com/watch?v=ctJyu5ete6Y&feature=relmfu

•Water in a bottle http://www.youtube.com/watch?v=gCMax4gZEoc&feature=endscreen&NR=1

•Balloon in a bottle http://www.youtube.com/watch?v=6kE3tGqWafY