Weathering and Erosion

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

• abrasion

• ice wedging

• acid rain

Ice wedging causes weathering by

• heating and cooling

• plant growth

• freezing and thawing of water

• animals digging rocks

What type of weathering causes mineral composition in rocks to change?

• physical weathering

• chemical weathering

• general weathering

• erosion

Which two types of climates causes weathering to happen rapidly?

• hot

• cold

• wet

• dry

Which two factors are most important in determining the rate of weathering?

• rock type

• type of plants

• acid rain

• climate

• abrasion

soil formation begins with the weathering of

• litter

• bedrock

• humus

• rocks

The solid rock layer beneath the soil is called

• bedrock

• topsoil

• A Horizon

• C Horizon

The loose layers of leaves on the surface of soil is called

• humus

• litter

• A Horizon

Topsoil is good for growing plants because it contains mostly

• humus

• litter

• B Horizon

The movement of rock particles by ice, water, wind, or gravity is called

• mechanical weathering

• chemical weathering

• erosion