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Flashcards in Geology Unit Deck (15)
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Atmosphere

Thin layer/ blanket of gas that surrounds the planet

1

Inner core

Composition: Solid metal
Density: most dense
Thickness: 3rd thickest

2

Outer core

Composition: liquid metal
Density: 2nd most dense
Thickness: 2nd thickest

3

Mantle

Composition: molten rock
Density: 3rd dense
Thickness: most thick

4

Crust

Composition: solid rock
Density: least dense
Thickness: least thick

5

Lithosphere

Composition: solid rock
-location of plates in the crust and upper-most part of the mantle.

6

Composition

What something is made of

7

Density

-mass divided by volume
-how much matter something has
-how compact atoms are

8

Plates

2 types: oceanic and continental
-They are always moving at a rate of a few centimeters to inches per year.
-They cover the entire planet

9

Magnetic field

The convention currents in outer core and the earths rotation are responsible for earths magnetic field

10

Convection currents

Cycle of currents and fluids that are caused by heat rising and falling
- in layers of earth it causes plate movement

11

Seismologist

Person who studies earthquakes

12

Plate tectonics

3 boundaries:
Transform
Divergent
Covergent

13

Seismic waves

3 types:
-Primary waves (longitudinal)
-secondary waves (transverse)
-surface wave (transverse)

14

Continental drift

-Earths continents were once together as a large mass (Pangea aka supercontinent) and slowly drifted away
-Plates are always moving a few cm to an inch per year