Material within the Earth is heated by the core resulting in the materials becoming ________. This change in density results in the material ________ until it reaches the lithosphere, where it begins to cool.

Question

Which set of words correctly complete the sentences above?
more dense; sinking
less dense: rising
less dense; sinking
more dense, rising

Answer 1

The correct set of words to complete the sentences is "less dense; rising."

So the complete sentences would read:

"Material within the Earth is heated by the core resulting in the materials becoming less dense. This change in density results in the material rising until it reaches the lithosphere, where it begins to cool."