Environmental Science | Plate Tectonics Flashcards
1
Q
How many major layers does the Earth have?
A
4 (Lithosphere, Mantle, Outer Core, Inner Core).
2
Q
What is the outermost layer of the Earth called?
A
Lithosphere (or crust).
3
Q
Name the three types of rocks in the lithosphere.
A
Sedimentary, igneous, metamorphic
4
Q
What is the boundary between the crust and mantle called?
A
Mohorovicic discontinuity (Moho).
5
Q
Is the mantle solid or liquid?
A
Acts like a fluid, but is made of rock.
6
Q
What causes the mantle’s rock to behave like a fluid?
A
High pressure and temperature.
7
Q
What is the outer core made of?
A
Liquid iron.
8
Q
Why is the inner core solid despite being hotter?
A
Immense pressure compacts atoms.
9
Q
What drives tectonic plate movement?
A
Convection currents in the mantle.
10
Q
What is the upper portion of the mantle called?
A
Asthenosphere.
11
Q
A
