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Subject: Size & Scale

Science activity to make Earth's atmosphere to scale
A Little Atmosphere

Strips of plastic on a globe model our atmosphere.

Science activity demonstrating diffusion in cells
Agar Cell Diffusion

Use agar cubes to investigate how size impacts diffusion.

Science activity demonstrating the physics of bubbles
Bubble Tray

Create giant bubbles!

Science activity to convert your cell phone into a Miniscope
Cell Phone Miniscope

Use your cell phone to explore the mini-scopic world.

Coincidencia cósmica

¡Descubre la “coincidencia cósmica” que hace posible los eclipses solares!

Science activity to understand the “cosmic coincidence” that makes solar eclipses possible.
Cosmic Coincidence

Discover the “cosmic coincidence” that makes solar eclipses possible!

Science activity that explores the relative sizes of the earth and moon and the distances between them
Earth and Moon

Create a scale model of the earth-moon system using different-sized spheres.

Eclipse a escala

¡Haz un modelo a escala de un eclipse solar total!

Eclipses solares

¡Usa el pulgar para eclipsar a tu amigo!

Giant Sieve Sorter

Boundaries are the gift that keeps on sifting.

Science activity that demonstrates use of nonstandard measurements and simple ratios for estimating sizes or distances
Handy Measuring Tool

Measure the height of an object indirectly using your hand and a ratio.

Science activity that explores growth rates for cultured cells
How Many HeLa?

Dividing cells expand exponentially.

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Attribution: Exploratorium Teacher Institute