Blowing Cans
Materials needed:
| approximately 25 drinking straws |
| two empty soda cans |
Instructions:
| Place the straws on a flat table top, parallel to each other and about 1 centimeter apart. |
| Place the cans upright on the straws, about five centimeters apart. |
| What do you think will happen if you blow air between the cans through a straw? Try it. What happened? Why? |
Blowing Paper off Books
Materials needed:
| paper |
| two thick books |
| metric ruler |
Instructions:
| Lay two thick books about 10 cm apart. |
| Place a sheet of paper on the books so that it bridges the gap between them. |
| Try to blow the paper off the books by blowing underneath it. What happens? Why? |
Blowing Sheets of Paper Apart
Materials needed:
| two sheets of paper |
| metric ruler |
Instructions:
| Hold two sheets of paper vertically about 5 cm apart. |
| Blow the sheets apart by blowing hard between them. What happens? Why? |
Ping-Pong Ball in a Funnel
Materials needed:
| ping-pong ball |
| funnel |
Instructions:
| Place a ping-pong ball in a clean funnel. |
| Hold the funnel upright and put the narrow end in your mouth. |
| Blow the ball out of the funnel. What happens? Why? |
Suspended Ping-Pong Balls
Materials needed:
| two ping-pong balls, or other small balls |
| string |
| tape |
| metric ruler |
Instructions:
| Tape a piece of string to each ping-pong ball. |
| Hang the balls at the same level about 5 cm apart. |
| Blow hard between the two balls. What happens? Why? |
Water Sprayer
Materials needed:
| two straws |
| drinking glass |
Instructions:
| Hold a straw upright in a glass of water so that the top of the straw projects over the top of the glass. |
| Place a second straw perpendicular to the first so that the end of the second straw is almost touching the opening of the first, but is not blocking it. |
| Blow hard through the second straw. What happens? Why? |