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1000 Science Fair Projects with Complete Instructions

Gas Laws

Gas Laws are rules that tell how heat, push, and space change the way gases act.

Think of it this way

A sealed plastic bag holds a small bit of air. When the bag is cool, the air takes up little space. Set the bag in the sun, and it puffs up. Heat makes the air push out in all directions. Squeeze the bag, and the air pushes right back.

Explaining gas laws by grade level

Blow up a balloon and hold it in your hands. Now put it in a warm spot, like near a sunny window. The balloon gets a bit bigger. The air inside moves faster when it is warm, and it pushes out more.

Projects that explore gas laws

Heat Expansion in Five Different Gases

Heat changes the space a gas fills — but not all gases expand by the same amount. You fill Mylar balloons with five different gases and submerge each one in water at temperatures from 1°C to 60°C, measuring the water displaced to track volume changes. Oxygen expanded the most at 36.5%. Carbon dioxide expanded the least at 15.3%. Helium, which lifts party balloons so well, finished fourth — not first.

Hard