Weathering And Soil Formation

Front 1

______________________ is the process of wind, water, ice or gravity moving soil from one place to another

Back 1

Erosion

Front 2

What are lichens?

Back 2

Tiny, plantlike organisims that produce acid and can slowly break down rock

Front 3

What is the product of weathering?

Back 3

soil

Front 4

Topsoil contains ___________ and _________________

Back 4

humus, bits of rock

Front 5

Where does most weathering of rock occur?

Back 5

Subsoil

Front 6

What dissolves nutrients in soil?

Back 6

Water

Front 7

______________ is a product that makes soil richer

Back 7

Fertilizer

Front 8

Soil rich in nutrients and provides the right conditions for plants to grow is___________

Back 8

Fertile

Front 9

___________ and ___________ are properties of soil

Back 9

Color; texture

Front 10

Which soil contains equal amounts of sand, silt, and clay and are best for growing crops?

Back 10

Loam

Front 11

What are the three main layers of soil?

Back 11

Topsoil, subsoil and bedrock

Front 12

_____________ is the process that breaks up rock

Back 12

Weathering

Front 13

What are three farming methods to save soil?

Back 13

contour plowing, strip cropping and terracing

Front 14

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is called

Back 14

abrasion

Front 15

Ice wedging causes mechanical weathering of rock by means of

Back 15

Freezing and thawing of water

Front 16

What kind of weathering causes the mineral composition of rocks to change?

Back 16

Chemical weathering

Front 17

Chemical weathering occurs more rapidly in what type of climate?

Back 17

Warm and wet climates

Front 18

The most important factors in determining the rate of weathering

Back 18

rock type and climate.

Front 19

Soil formation begins with the weathering of ___________.

Back 19

bedrock

Front 20

What is humus?

Back 20

Decaying organic matter