Weathering and Soil Review

This mechanical weathering agent weathers a rock by grinding it down

• abrasion

• erosion

• ice wedging

• cracking

Ice wedging causes mechanical weathering of rock by means of

• heating and cooling

• plant growth

• animal action

• freezing and thawing of water

Tags

NGSS.MS-ESS2-2

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

• mechanical

• chemical

• permeable

• general weathering

Tags

NGSS.MS-ESS2-4

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

In soil, decomposers

• store moisture in the soil

• break down and digest the remains of dead organisms

• break down bedrock

• burrow deep below the topsoil

Tags

NGSS.MS-LS2-3

Soil that is not protected by plant cover (moss, trees, grass) will

• chemically weather

• erode by water or wind

• mechanically weather

• contain too many organisms in the soil

Plowing removed the grass from the Great Plains and exposed the soil. What effect did this have when a drought struck the Great Plains during the 1930s?

• It had no effect

• It increased the soil's fertility

• It helped to cause the Dust Bowl

• It prevented sod from developing

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

What term describes the management of soil to prevent its destruction?

• soil exhaustion

• soil decomposition

• soil conservation

• soil fertility

The practice of plowing fields along the curves of a slope is called

• drought plowing

• contour plowing

• no-till plowing

• sod plowing

The type of soil called loam is made up of

• pure humus

• mostly clasy

• nearly equal amounts of silt, sand, and clay

• sand and gravel