4C & D Flashcards
What are the three main layers of the earth?
Crust, mantle, and core
True or false: the crust is made of rocks
True
Seismic waves move _______ as you go deeper into the crust
Faster
The Moho line is located at the _______ of the crust and separates the crust and the mantle
Bottom
When the speed of a wave starts to slow, this is called ___________
Discontinuity
Do waves speed up or slow down at the Moho line?
Slow down
The mantle is of 2 parts: the upper mantle and the _____________.
Asthenosphere
The upper mantle moves with the tectonic plates and is made of ________.
Rock
The upper mantle and crust combined are called the _____________.
Lithosphere
Below the upper mantle is the ______________
Asthenosphere
True or false: waves move slower in the asthenosphere
True
The asthenosphere is made of _____________ rocks
Melting
The mantle takes up _____% of the earth’s volume
84
The _______ takes up 15% of the earth’s volume and is located below the mantle
Core
True of false: the earth’s core is freezing
False, it is extraordinarily hot