Earth's Complex Structure

Question 0

Crust

Answer 0

Is the first layer, include landmasses and the ocean floor. It is about 30 miles thick.

Question 1

Main idea of Earth’s complex structure

Answer 1

Physical processes within Earth bring about changes on the surface.

Question 2

Mantle

Answer 2

Consists of molten rocks called magma. The mantel is about 1,800 miles thick and has two parts: the upper mantle and the lower mantle.

Question 3

Core

Answer 3

Is about 1,400 miles thick. This layer is mostly liquid, consisting of molten iron and nickel.

Question 4

Inner core

Answer 4

Is about 700 miles thick, it reaches a temperature of 12,000° f. The Inner core is made of iron, which remains solid.

Question 5

Tectónica plates

Answer 5

Earth’s crust is divide into sections.

Question 6

Continental drift

Answer 6

The plates moved into their current positions.