Layers of the Earth

Question 1

What is responsible for making the lithospheric plates move?

Accepted Answer

convection currents

Question 2

Earth's core is divided into these two layers.

Accepted Answer

inner and outer cores

Question 3

This is the thinnest layer of the earth.

Accepted Answer

crust

Question 4

When magma cools off, it becomes more dense, so it ___.

Accepted Answer

sinks, stays in the same place

Question 5

How does the density change from the crust to the core?

Accepted Answer

The density increases.

Question 6

Why is the inner core a solid?

Accepted Answer

It is under a lot of pressure.

Question 7

How does the temperature change from crust to core?

Accepted Answer

The temperature increases.

Question 8

what is the crust and upper mantle called

Accepted Answer

lithosphere

Question 9

Which of the following does NOT describe the crust?

Accepted Answer

hottest layer

Question 10

what is the soft layer on which the lithosphere pieces float

Accepted Answer

asthenosphere

Question 11

The crust is thick under the continents and thin beneath the oceans.

Accepted Answer

True

Question 12

This layer of earth is the only liquid layer (molten iron and nickel)

Accepted Answer

outer core

Question 13

Which of the following does NOT describe the core?

Accepted Answer

completely solid

Question 14

When magma heats up, it becomes less dense, so it ___.

Accepted Answer

rises

Question 15

Scientists know that the inner core and outer core exist because of

Accepted Answer

seismic waves

Question 16

what is the outer most layer of Earth

Accepted Answer

crust

Question 17

Which layer is the thickest layer?

Accepted Answer

mantle

Question 18

This layer is very flexible (plastic) so that it will flow instead of breaking or cracking up.

Accepted Answer

mantle

Question 19

Which of the following does NOT describe the mantle?

Accepted Answer

liquid layer

Question 20

This layer is solid metal (iron and nickel) at the center of Earth

Accepted Answer

inner core

Question 21

Which layer of the earth do we live on?

Accepted Answer

crust

Question 22

This layer of earth is composed of flowing rock called magma.

Accepted Answer

mantle

Questions 22