Question

5. Where does all new ocean crust form? Why? 6. Enter the terms in the left column into the approplate boxs. Terms Oceanic Lithosphere Continental Lithosphere • New rocks forming • Old rocks melting - Contains oldest rocks - Contains youngest rocks • Less than 250 million years • Older than 250 million years • High Density • Low Density

number six

Answer 1

Given terms and their associated lithosphere are listed in the table below.

Terms	Oceanic Lithosphere	Continental Lithosphere
New rocks forming Old rocks melting Contains oldest rocks Contains youngest rocks Less than 250 million years Older than 250 million years High density Low density	New rocks forming Old rocks melting Contains youngest rocks Less than 250 million years High density	Contains oldest rocks Older than 250 million years Low density

Formation of new rocks are associated with mid oceanic ridge and melting of oldest rock is associated with subduction zone.

Oceanic lithosphere is younger than continental lithosphere. Oceanic lithosphere is generally younger than 250 million years, whereas continental lithosphere is older than 250 million years.

Oceanic lithosphere is denser than continental lithosphere. So, in ocean-continent subduction, Oceanic lithosphere subducts below continental lithosphere.

That's all.