Submerge an upside-down test tube or small beaker in a large beaker of water.
What do you notice about the level of water in the tube as it is raised and lowered in the beaker?
Can you explain why this happens in terms of pressure and volume?
Why doesn't the air come out of the tube?
Tip the tube slightly.
What happens?
Pretend that you and your classmates are gas molecules.
How is the inside of your classroom like a balloon?
How could your group of gas molecules escape?
Is the playground like a balloon?
Is it easy or hard to get out?
At absolute zero,you're packed all together in a corner of the room.
As the temperature goes up,you begin to vibrate and move around.
Can you stay close as the temperature increases?
Inflate two balloons to equal size.
Place one in a pan of hot water and the other in a pan of cold water.
What happens?
What will happen to equal-sized balloons in a range of temperatures?