Science Test 10/16

Question 1

sea-floor spreading

Answer 1

the hypothesis that the sea floor moves sideways away from the crest of a mid ocean ridge

Question 2

seamount

Answer 2

mountain under the sea

Question 3

continental shelf

Answer 3

the part of the continental plate that is underwater

Question 4

mid-ocean ridge

Answer 4

a continuous mountain range extending through the North and South Atlantic Oceans, the Indian Ocean, and the South Pacific Ocean.

Question 5

rift valley

Answer 5

the deep central cleft in the crest of the mid-ocean ridge.

Question 6

What are the tectonic plates part of

Answer 6

The lithosphere

Question 7

Lithosphere

Answer 7

Rigid outer part of the Earth, consisting of the crust and upper mantle

Question 8

Asthenosphere

Answer 8

The part of Earth’s mantle below the Lithosphere

Question 9

What do divergent plates cause

Answer 9

They cause volcanoes and also new rock to form (igneous)

Question 10

Describe the rock right above a divergent plate boundary

Answer 10

Young and hot

Question 11

What type of rock makes up continental crust

Answer 11

Granite

Question 12

What type of rock makes up the crust on the ocean floor

Answer 12

Basalt

Question 13

What is more dense, basalt or granite?

Answer 13

Basalt

Question 14

If granite and basalt meet, which one subducts?

Answer 14

Basalt because it’s more dense so it goes below