Question

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.

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 that 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."