Did you know?

• A fixed amount of water recirculates around the Earth.
• Water moves in certain directions from place-to-place (reservoir-to-reservoir) by only certain processes and pathways.
• Some processes of transfer are rapid while others are much slower.
• A conceptual "reservoir" of water is not quite the same thing as a reservoir in which water is stored.
• When land-based glacial ice melts and runs off into the sea, sea level rises.
• When land-based glacial ice forms, sea level drops.
• When floating icebergs melt into the sea, sea level doesn't change.
• Glacial ice is made up of freshwater that had previously fallen as snow.
• Evaporation of seawater requires an input of energy; condensation of clouds releases energy.

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