Cls 8Th Weathering And Soil

Front 1

the breaking down of rocks and other materials on earth surface

Back 1

weathering

Front 2

the scraping of rock by wind-blown pieces of rock

Back 2

abrasion

Front 3

different kinds of rock weather at different ...

Back 3

rate

Front 4

rock weathers faster in a _____ climate

Back 4

wet

Front 5

the minerals that make up the rock determines how fast it ...

Back 5

weathers

Front 6

the material of earth's surface in which plants can grow

Back 6

soil

Front 7

The __ horizon contains a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals

Back 7

A-horizon

Front 8

the process that forms soil

Back 8

weathering

Front 9

the last layer of soil is the ____

Back 9

C- horizon

Front 10

The second layer of soil is called the

Back 10

B-horizon

Front 11

the soil in the B- horizon is also called

Back 11

subsoil

Front 12

the soil in the A-horizon is also called

Back 12

topsoil

Front 13

ice wedging is a form of ____ weathering

Back 13

mechanical

Front 14

mechanical weathering is faster in a climate that is ....

Back 14

cool

Front 15

acid rain, oxygen, carbon dioxide, the action of water, and living organisms are all part of ___ weathering

Back 15

chemical

Front 16

in chemical weathering, the ___ of rocks changes

Back 16

makeup

Front 17

plant growth is part of ____ weathering

Back 17

mechanical

Front 18

What is under the C horizon

Back 18

bedrock

Front 19

the loose layer of dead plant remains over the top soil is called

Back 19

litter

Front 20

2 types of weathering

Back 20

mechanical and chemical

Front 21

list 5 forces of mechanical weathering

Back 21

freezing, thawing, releasing pressure, growth of plants and action of animals

Front 22

ice wedging cycle

Back 22

1. water seeps into cracks 2. freezes, forms ice and expands 3. ice widens cracks 4. melts, seeps deeper and freezes and thaws over and over

Front 23

list 4 agents of chemical weathering

Back 23

water, oxygen, CO2, and acid rain

Front 24

What causes iron to rust

Back 24

oxygen

Front 25

what is caused by pollution

Back 25

acid rain

Front 26

mechanical weathering works ....

Back 26

slowly

Front 27

the decayed organic material in soil is called

Back 27

humus

Front 28

no till farming

Back 28

leaving crops where they are at the end of the growing season so they die and become fertilizer

Front 29

terrace farming

Back 29

slows down the flow of water so that soil is not washed away

Front 30

contour farming

Back 30

planting crops on the hillside

Front 31

wind break

Back 31

planting grass and trees as a buffer against the wind