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My name is Silver and I am going to teach you about: Plucking, Abrasion and Freeze-Thaw.
This is a sight of abrasion. Abrasion is when rocks that have been picked up are carried down the valley and wear away the valley sides and bottom. This causes more rocks to be broken off.
This is where Freeze-Thaw happens. Freeze-Thaw is when daytime temperatures allow ice to melt and it is cold enough at night for the water to freeze again. When it melts it runs into cracks and expands by 9% every time it freezes again.
Heat causes a small amount of ice to melt. The water runs into cracks in the valley and immediately refreeze. The glacier moves and pulls away some of the rock face. This is called plucking.
That is the end of our learning. Thanks for learning with me. Silver out!
THis all happened thanks to my friends Alyssa and Cassie!
Cassie: Thanks Silver!
Alyssa: Ya. Thanks Silver!
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