Earth's Layers
What are the three main layers of the Earth?
Crust, mantle, core
What type of rock is the crust mostly made of?
Solid rock
Is the mantle above or below the crust?
Below
What is the core mainly made of?
Iron and nickel
Was early Earth solid or molten?
Molten
Which layer is the thickest?
Mantle
Which crust is thinner: oceanic or continental?
Oceanic crust
About how thick is the mantle?
About 2,900 km
Is the outer core solid or liquid?
Liquid
What happens to denser materials during Earth’s formation?
They sink
Which layer is the thinnest?
Crust
About how thick is oceanic crust?
About 10 km
What happens to temperature as you go deeper into the mantle?
It increases
Is the inner core solid or liquid?
Solid
What happens to lighter materials?
They rise
Which layer is the innermost?
Core
About how thick is continental crust?
About 70 km
What is molten rock in the mantle called?
Magma
Why is the inner core solid?
Due to extremely high pressure
What two layers make up the lithosphere?
Crust and upper mantle
What are the two parts of the core?
Inner core and outer core
What does the crust + upper mantle form?
Lithosphere
What percentage of Earth’s volume is the mantle?
About 83%
About what is the radius of the core?
About 3,500 km
What is the geosphere?
The solid part of Earth