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Flat illustration of the water cycle featuring a dark rain cloud, brown mountains, a winding river, and a bright sun

Can you track the planet's pulse and master every phase of this hydrologic quiz?

Climates of the World

Difficulty

Medium

Questions

20

Volts

2/q

Most of the planet's water is locked away in deep reservoirs and ancient ice. Your task is to track the journey from ocean evaporation to surface runoff and deep rock infiltration. The clock is ticking while you calculate exactly how long a single molecule stays in the air.

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