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Where Everything Happened
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Forces That Shape the Land

Intermediate

Five questions from this wave's physical-process research: wind, gravity, monsoon rain, the slow rebound of the crust, and the carbon locked in frozen ground.

Choose how you want to play.

Practice
Untimed. Take as long as you like with each question. Practice attempts are never scored on the leaderboard.
Ranked
Timed, to keep the leaderboard fair. You will see exactly how much time you have before you begin. Limited to three ranked attempts per length.