Earth Science Section 1

Front 1

Chemical weathering

Back 1

Process by which the chemical composition of rock changes

Front 2

Deposition

Back 2

Process in which eroded sediment is laid down on earth's surface

Front 3

Erosion

Back 3

Process in which sediment is moved over earth's surface

Front 4

Fossil record

Back 4

The sequence of all fossils on the earth, shows the history of life on earth

Front 5

Fossils

Back 5

Evidence that organism existed in the distant past

Front 6

Igneous rock

Back 6

Form when molten rock cools and hardens

Front 7

Imprint

Back 7

An organism or part of an organism in a rock

Front 8

Metamorphic rock

Back 8

Form when heat and pressure change

Front 9

Molten rock

Back 9

Rock that is on earth's surface

Front 10

Physical weathering

Back 10

A rock breaks into smaller pieces, but it's chemical composition does not change very much

Front 11

Rock cycle

Back 11

Process that change from one thing to another

Front 12

Sediment

Back 12

Pieces of broken rock

Front 13

Sedimentary rock

Back 13

Form from sediment or from the remains of living things

Front 14

Weathering

Back 14

The break down of rocks into smaller pieces

Front 15

Soil

Back 15

Mixture od sediments, decayed organic material, water, and air that covers the ground

Front 16

Topsoil

Back 16

Nutrient- rich upper layer of a soil.

Front 17

Fertile soil

Back 17

Holds a lot of nutrients

Front 18

Subsoil

Back 18

Nutrients - poor,sediment-rich layer or layers of soil below the topsoil

Front 19

Bedrock

Back 19

Solid, or slightly broken pieces of rock that lies below soil

Front 20

Humus

Back 20

Soft, spongy component of soil that is made of the dead remains of organisms

Front 21

Texture

Back 21

If the soil is course grained or fine grained

Front 22

Loam

Back 22

Is the soil in which sand, slit, and clay are present in about equal amounts

Front 23

Porosity

Back 23

Is how much the soil between the sediment grains

Front 24

Permeability

Back 24

How water can get in the soil and how easily water moves through soil

Front 25

Parent material

Back 25

Is the rock or rocks that weathered to form the sediment part of the soil

Front 26

Loess

Back 26

Is the fine-grained sediment that is deposited by wind