the sea floor that forms at spreading ridges and then moves away will: group of answer choices be ground up by glaciers, blown away by wind, and eventually escape to space in the solar wind. be subducted, with most of the material going back into the mantle, balancing the material coming out to make the new sea floor. remain at the surface of the earth forever, resulting in the earth getting bigger and bigger every year. remain at the surface of the earth forever, but the earth isn't getting bigger because the insides of the earth are shrinking as they cool off rapidly.