Author Question: Above the permafrost layer, the _______________ layer freezes during winter but thaws during summer. ... (Read 87 times)

bclement10

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Above the permafrost layer, the _______________ layer freezes during winter but thaws during summer.
 Fill in the blank(s) with correct word

Question 2

The free fall of rock through air is called _______________.
 Fill in the blank(s) with correct word



frankwu0507

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Answer to Question 1

active

Answer to Question 2

rockfall



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