Question

fill in the blank question
the discovery of spreading showed that crust can be pushed apart when rises up at a mid - ocean ridge. this discovery supported the hypothesis that drift over time.
need help? review these concept resources.
read about the concept

Explanation:

The theory of sea - floor spreading shows that new oceanic crust is formed as magma rises at mid - ocean ridges, pushing the existing crust apart. This supports the idea of continental drift, where continents move over time.

Answer:

sea - floor; magma; continents