Chapter 2.1 Science Vocab

Front 1

Oblate Spheroid

Back 1

The shape of the earth, a slightly flattened sphere.

Front 2

Axis

Back 2

Imaginary line that runs through North Pole and South Pole.

Front 3

Hydrosphere

Back 3

All the earth's water.

Front 4

Atmosphere

Back 4

A blanket of gases that surrounds the earth.

Front 5

Seismic Waves

Back 5

Vibrations that travel through the earth.

Front 6

Crust

Back 6

The Outer Covering of the earth.

Front 7

Oceanic Crust

Back 7

Crust beneath the Oceans. Thin dense layers. 5-10km thick.

Front 8

Continental Crust

Back 8

Part of Crust which continents rest on. 32-70km thick.

Front 9

Mantle

Back 9

Zone of Rock beneath the mantle. 2,870km thick. Separated into 2 different Regions

Front 10

Upper part of Mantle

Back 10

Lithosphere, top part of mantle and some of crust. Is solid, 65-100km thick.

Front 11

Lower Mantle

Back 11

Asthenosphere, 200km thick, A lot of heat and pressure, solid rock can flow.

Front 12

Plasticity

Back 12

The Ability of solid rock to flow.

Front 13

Core

Back 13

Center of the Earth. Outer core is a dense liquid layer, 2190km thick, inner core is a dense solid, 2680km in diameter.

Front 14

S Waves

Back 14

Seismic Waves

Front 15

P Waves

Back 15

Primary Waves

Front 16

Shadow Zones

Back 16

Recordings of Seismic waves around the earth.

Front 17

Magnetosphere

Back 17

Region of Space affected by the earth's magnetic field.

Front 18

Gravity

Back 18

The force of attraction that exists between all matter in the universe.

Front 19

Law of Gravitation

Back 19

Where Newton described the effects of Gravity. Force of attraction between any two objects depends on their masses and the distance between

Front 20

Weight

Back 20

measure of strength of the pull of gravity on an object.

Front 21

Newtons (N)

Back 21

Weight is measured in Newtons

Front 22

Mass

Back 22

The amount of matter in an object