Unit 4 Lesson 1

Question 1

Crust

Answer 1

The outermost solid layer of earth

There are two types of crust- the Continental and the oceanic

Question 2

Mantle

Answer 2

Is located between the core and the crust

Made of hot, slow-flowing, solid rock

Question 3

Convection

Answer 3

Is the movement of matter that results from differences in density caused by variations in temperature

Question 4

Core

Answer 4

extends from below the mantle to the center of earth

Made mostly of iron and some nickel

Question 5

Lithosphere

Answer 5

The outermost , rigid layer of earth

It is made up of two parts- the crust and the rigid, upper part of the mantle

Also, it is divided into pieces called tectonic plates

Question 6

Asthenosphere

Answer 6

a layer of weak or soft mantle that is made of rock that flows slowly

Question 7

Mesosphere

Answer 7

the strong, lower part of the mantle

Rocks in the mesosphere flows more slowly than rocks in the asthenosphere does

Question 8

What are Earth’s compositional layers?

Answer 8

These layers are called the crust, the mantle, and the core

Crust - made mainly of oxygen, silicone, and aluminum
Mantle - It contains more magnesium and less aluminum and silicone than the crust does
Core - It contains much less oxygen, silicone, aluminum, and magnesium than the mantle does.

Question 9

What are Earth’s physical layers?

Answer 9

They are the lithosphere, asthenosphere, mesosphere, outer core, and inner core

Question 10

Earth’s Core

Answer 10

Outer core - liquid layer

Inner core - solid layer

Question 11

Earth’s Crust

Answer 11

Oceanic crust - has almost twice as much iron, calcium, and magnesium than the continental crust. So is denser than the continental crust because of the minerals

Continental crust is thicker than oceanic crust