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Measure the height of an object indirectly using your hand and a ratio.
Find the height of a tree, paper rocket or North Star.
Focus the invisible light from an electric heater.
Dividing cells expand exponentially.
How do you put a straight rod through a curved slot?
Why the world gets dark so fast outside the circle of the campfire.
Gelatin can do much more than just wiggle and jiggle.
Imperfect alignment can lead to interesting patterns.
Surprisingly, a flat panel rolls smoothly on non-circular rollers.
Compare the brightness of two light sources with an oil spot on a white card.
Get Bach to the fundamentals.
Pendulums dance in a shifting series of patterns as they swing to their own rhythms.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Attribution: Exploratorium Teacher Institute
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