Weathering and Soil Formation

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

• erosion

• cracking and peeling

• abrasion

• ice wedging

Ice wedging causes mechanical weathering of rock by means of

• heating and cooling

• plant growth

• animal actions

• freezing and thawing of water

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

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

• mechanical weathering

• permeable weathering

• chemical weathering

• general weathering

A rock containing iron becomes soft and crumbly and reddish-brown in color. It probably has been chemically weathered by

• abrasion

• carbon dioxide

• oxygen

• acid rain

Tags

NGSS.MS-ESS2-2

A hot and wet climate causes weathering to take place

• slowly

• at the same rate as when the climate is dry and cool

• unevenly

• rapidly

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-1

The most important factors in determining the rate of weathering are

• carbon dioxide and acid rain

• abrasion and acids from plant roots.

• animal actions and oxygen

• . rock type and climate

Soil formation begins with the weathering of

• litter

• bedrock

• the A horizon

• humus

Tags

NGSS.MS-ESS2-2

Soil that is rich in humus has high

• fertility

• water content

• sand content

• clay content.

Tags

NGSS.MS-LS1-5

Soil formation would take place most rapidly with the weathering of

• granite on a mountain top.

• limestone in a desert.

• granite in a cold, dry climate.

• limestone in a warm, wet climate.

Tags

NGSS.MS-ESS2-2

When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of

• silt

• litter

• humus

• clay

Tags

NGSS.MS-LS2-3