Layers of the Earth Flashcards
What are the four layers of the earth?
Crust, Mantle, Outer Core, and Inner Core
What is the outermost shell of a terrestrial planet?
Crust
How thick is the crust under oceans?
8 kilometers
How thick is the crust under continents?
32 kilometers
What is the largest layer of the Earth?
Mantle
It is composed of very hot, dense rocks.
Mantle
It flows like asphalt under heavy weight.
Mantle
It is a ball of very hot metals.
Outer Core
All metals in this layer are all in liquid state.
Outer Core
It is liquid due to the temperature.
Outer Core
This has temperatures and pressures so great that the metals are squeezed together.
Inner Core
This layer is forced to vibrate in place like a solid.
Inner Core
This is composed of major and minor blocks.
Lithosphere
This is also called the tectonic plates.
Lithosphere
This interacts and creates the tectonic plates on earth.
Lithosphere
This contains hot, molten rocks or magma.
Asthenosphere
This is reformed and reshaped driven by heat energy, which circulates as convection currents.
Asthenosphere
This is from the hot lower mantle to upper cooler mantle.
Asthenosphere
This helps drive the movement of tectonic plates, which is manifested as earthquakes.
Asthenosphere
What is the process of convection currents?
- Heat is generated in the outer core.
- Convection
- Ridge Push
- Plates float on the convection currents of the asthenosphere.
- Slab Pull
