Topic 7: Earth's Layers

Earth's interior is made up of how many main layers?

The three main layers of Earth's interior are

Earth's main layers vary greatly in ​ (a)   , ​ (b)   ,​ (c)   , and ​ (d)   .

• thickness
• composition
• temperature
• pressure
• mass

What causes pressure?

• force pressing on an object

• high temperature

• energy

The ​ (a)   of rock that is pressing down from above causes an increase of ​ (b)   in the rocks below.

• mass
• pressure
• matter
• heat

Earth's ______ is the rock that forms Earth's outer layer, including both dry land and ocean floor.

The main elements of the rocks in the crust are

• oxygen

• silicone

• carbon dioxide

• gold

The Earth's crust is very ______.

The Earth's crust is ​ (a)   under high mountains and thinnest beneath the ​ (b)   ​ (c)  

• thickest
• ocean floor
• lakes and rivers
• hottest

The two types of crust are

• oceanic

• continental

• mantle

• core