Subject: Oceans & Water

Is pure water colorless?

As René Descartes (almost) said, "I sink, therefore I am."

Make a conductivity meter and let your electrolytes shine.

Make your own heat waves in an aquarium.

Create a convection cell inside a CD case.

Submerge yourself in underwater color perception.

Construct a simple hydrometer to compare the densities of solutions.

Create clouds in a bottle by rapidly expanding the air.

Model the carbon cycle and its principal reservoirs and flow rates using rice.

Watch the rise and fall of hot and cold fluids.

This density column always returns to its original three layers.

A carbon dioxide–rich atmosphere changes the water beneath it.

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