Earths Interior

Question 0

What is the crust made of?

Answer 0

Oxygen, silicone, aluminum, and iron

Question 1

The outer layer of the earth is called?

Answer 1

Crust

Question 2

What is beneath the crust?

Answer 2

The mantle

Question 3

What are the two different types of the mantle?

Answer 3

outer and inner layers

Question 4

What is the layer of cool, rigid rock in the uppermost layer of the mantle?

Answer 4

Lithosphere

Question 5

The inner layer beneath the lithosphere in the mantle is called?

Answer 5

Asthenosphere

Question 6

What is the strongest part of the lower mantle beneath the asthenosphere?

Answer 6

mesosphere

Question 7

What is denser than the mantle?

Answer 7

Core

Question 8

Describe the core in three ways

Answer 8

Temp reaches 7000 C
Large sphere of metal that occupies the earth’s center
Made mostly of iron

Question 9

What are the two types of the core?

Answer 9

Outer and inner core

Question 10

How deep is the outer core and what is it?

Answer 10

2260 km

So hot it is a liquid

Question 11

How deep is the inner core and what is it?

Answer 11

1220 km

It is a solid

Question 12

What is the continental drift?

Answer 12

When the continents move slowly across the earth’s surface

Question 13

What did Wegener hypothesize?

Answer 13

That the continents were once joined in a single supercontinent called a Pangaea. It broke into pieces and moved apart.

Question 14

What is sea-floor spreading?

Answer 14

When the pieces of the ocean floor move apart on each side of the crack, magma fills in the gap forming new crust.

Question 15

What is subduction?

Answer 15

As the sea floor spreading occurs, old oceanic plates sink into the mantle

Question 16

What is a trench?

Answer 16

As a plates sinks, it bends, forming a large groove in the ocean floor

Question 17

What does sea floor spreading create?

Answer 17

New crust at mid ocean ridges.

Question 18

What is the chain of underwater mountains along the floor of the Atlantic Ocean are called?

Answer 18

Mid-Atlantic Ridge

Question 19

What was the major evidence used to support Wegner’s theory of continental drift?

Answer 19

Sea floor spreading

Question 20

What causes the plates to move?

Answer 20

Convection current under the lithosphere

Question 21

What is convection current?

Answer 21

The cores heat energy is transferred to the inner layer causing it to rise towards the earth’s surface.
It then cools and sinks as the heated mantle transfers into heat energy to the the lithosphere.