Under Pressure
6th Class Worked on some experiments today to investigate air pressure and aerodynamics. This involved taping balloons to strings and throwing paper aeroplanes around the yard. The planes were not as effective as hoped- D7ET pupils are obviously too well-behaved to have practiced this in the past.
AIR SCIENCE EXPERIMENTS
|
INVESTIGATION |
PROCESS |
PREDICT RESULT |
ACTUAL |
| A Vacuum (p52) | Suck air through straw from a carton
|
|
Walls will collapse inward due to air pressure from outside not being matched inside. |
| Air pressure | Blow between 2 sheets of A4 paper held at both sides of your mouth |
|
The two sheets move together. Creating a vacuum or less air pressure on inside. |
| Concentrated air pressure | Blow into the spout of a funnel upwards, containing a tennis ball. (p54) |
|
Tennis ball did not move upwards at all. Air pressure from above greater than that of moving air. |
| Power of Compressed Air | Put a 3m string inside a straw. Tie string ends to two chairs.
Inflate a balloon, and hold closed with a paperclip. Tape the balloon to the straw. Release paperclip. |
Balloons should move along string under air pressure. |
