Physics · Electromagnetism
Build a homopolar motor and measure what changes its speed
Make the simplest electric motor from a cell, a magnet and wire, then test how magnets change its speed.
- Easy
- 1–3 hours
- Under 250
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Biology · Human Physiology
Build a model of the lungs and measure lung capacity
Make a bell-jar lung model from a bottle and balloons, then measure real lung capacity by displacing water.
- Beginner
- 1–3 hours
- Under 250
Environmental Science · Climate
Model the melting of ice caps and sea level
Show that melting land ice raises water level but melting floating ice does not.
- Beginner
- 1–3 hours
- Under 250
Physics · Optics
Show total internal reflection with a water stream
Trap a laser beam inside a curved stream of water, the way an optical fibre works.
- Easy
- 1–3 hours
- Under 250
Chemistry + Biology
Extract DNA from fruit in your kitchen
Pull visible strands of DNA out of a banana or strawberry with soap, salt and cold alcohol.
- Beginner
- 1–3 hours
- Under 250
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