Toying Around With Air Pressure

Materials You Will Need:

• Cotton Swab


• Paper


• Blunt-End Scissors


• Scotch Tape


• Straw


• Empty Plastic Soda Bottle or Water Bottle

Procedure:

1. Cut a circle about 4 cm in diameter from your paper. Cut a slit to the center of the circle, (2cm) and then shape into a cone and secure shape with a piece of Scotch Tape. Trim the point of the cone to make a small hole at the top.
2. Cut off the cotton from one end of a cotton swab. Push the cotton on the other end of the swab up through the hole so that the cone stays on the swab snugly. This is your air pressure rocket. (Fig.1)
3. Place a straw into the empty bottle and hold it in place. Use the same hand that is holding the straw in place to seal the opening of the bottle as much as possible. Place the air pressure rocket into the straw. (Fig.2)
4. Point your rocket away from your face and away from any one else. Give the bottle a hard squeeze. Your rocket should zoom. (Fig.3)

Fig. 1

Fig. 2

Fig. 3

Estimated Time around 20 min.

Challenge: Try using a different bottle, straw set-up, or rocket design to create an air pressure rocket that goes the farthest!

Useful Hints: Air will always move from an area of high pressure to an area of lower pressure. Also air can be compressed; it has a higher and higher air pressure. With these two air pressure facts you can use them to make an air pressure rocket.

Now Can You Answer This?

• Which bottle has more air pressure: A 2 Liter soda bottle or a .5 Liter water bottle?

My Source:
--Click Here!--

Useful Links:
Link1

Useful Links:
Link2

Useful Links:
Link3