Earth Science Ch.2.l

Front 1

Equator

Back 1

Is an imagainary line that divides the Earth into Northern and Southern hemispheres

Front 2

Oblate Spheroid

Back 2

A slightly flatened sphere

Front 3

Axis

Back 3

is an imagainary straight line running through the center of the Earth from the North to the South pole

Front 4

Hydrosphere

Back 4

all the Earth's water

Front 5

Atmosphere

Back 5

The Earth surrounded by a blanket of gas

Front 6

Seismic Waves

Back 6

are the vibrations that run through the earth

Front 7

Crust

Back 7

The thin most outer crust of the earth

Front 8

Mass

Back 8

Is the amount of matter in an object

Front 9

Oceaninc Crust

Back 9

Is the crust beneith the oceans

Front 10

Containental Crust

Back 10

is the part of the crust that on which the contenaints lie

Front 11

Mantle

Back 11

below the crust also makes up 2/3s of the Earth's crust

Front 12

Lithosphere

Back 12

The solid portion of the crust above it

Front 13

Asthenospere

Back 13

just below the lithosphere is a region of the mantle

Front 14

Plasticity

Back 14

the ability of solid flow

Front 15

Core

Back 15

below the mantle

Front 16

Shadow zones

Back 16

are locations on the Earth's surface where neither S waves or P waves are detected

Front 17

Magnetosphere

Back 17

a reigon of space that is effected by Earth's magnetic field.

Front 18

Gravity

Back 18

force of attraction between all matter in the universe

Front 19

Law of Gravitation

Back 19

states that the force of attraction depends on therir masses and the distance between them

Front 20

Weight

Back 20

the force of gravity exerted on a given mass

Front 21

Moho

Back 21

the boundary between the crust and the mantle is called Mohorovicic Disontitnuity or Moho.

Front 22

Newtons

Back 22

An SI unit (weight is measured in Newtons)

Front 23

P waves

Back 23

Means Primary waves

Front 24

S waves

Back 24

Means Secondary waves