Last week, the 4th and 5th graders explored the properties of air using syringes, tubing and clips. By pushing the air back and forth, we determined that air is made of matter and does take up space. The students also did a reading that explained how the pressure and density of air changes with elevation.
Key questions:
- What happened when you put a clip on the end of the tube and why? (The plunger to the syringe couldn't go in far because the air was trapped.
- Why did the plunger of one syringe go out when you pushed the other connecting syringe in? (The air pushed the plunger out when we pushed on the other end.)
- Is air pressure higher or lower on the top of a mountain? Why? (The air pressure is lower because the air molecules are spread out more. This is also why it's harder to breathe at elevation.)
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