Vibrating pennies – conduction science experiment

United States One Cent Obverse penny

Remember – heat causes things to expand (or get larger). Cold causes things to contract (or get smaller). The heat from your hands is transferred through conduction to the air in the bottle warming the air. This causes the air molecules to move faster which makes the penny jump.

Read more

Galileo’s free fall experiment – which will hit the floor first?

Leaning Tower of Pisa

You probably already know about the mystical force that exists on Earth called gravity. It pulls everything down toward the ground. It’s pretty amazing, because without gravity we would all be floating around in space. But have you ever wondered if this force pulls heavy objects down faster than light objects? The answer may surprise…

Read more