1. Helium Balloon
Why does the balloon shrink?
Why does the balloon fall to the ground?
2. Balloons in a car
Why do the helium balloons go forwards when the car brakes?
3. Drinking liquid Nitrogen
What would happen if he swallowed the liquid?
Don't try this ever ever ever.
4. Brownian Motion
Why was this such important evidence for the particle nature of matter?
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