Homework Help: Physical Science

Posted by Patrice on Thursday, October 11, 2012 at 8:20pm.

After a sled has passed several times over a snowy path on a hill, the grass or dirt under the snow may begin to show through where the sled has traveled. Why?

Physical Science - kennedy, Tuesday, February 26, 2013 at 7:12pm
recks the sled

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