Erosion and Weathering

A mass movement that involves the sudden movement of a block of material is called a

• rockfall

• slide

• slump

• flow

Oversteepened slopes often lead to mass movements because

• the angle of their slope is between 50 and 60 degrees

• plants cannot grow on them.

• the angle of their slope is less than 50 degrees

• the angle of their slope is greater than 40 degrees.

Which of the following is NOT true about mass movement?

• Some mass movement is too slow to be seen.

• Mass movement always leads to landslides.

• Gravity is the driving force behind all mass movements.

• Mass movement is always downslope.

Tags

NGSS.MS-PS2-4

Since humans have been present, the amount of sediments carried by rivers has

• increased by a factor of about 2.7.

• increased slightly.

• stayed about the same.

• decreased by about half.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Laterite soils contain high amounts of

• potassium oxide.

• aluminum-rich clay.

• calcium carbonate.

• iron oxide.

Pedalfer soils would most likely be found

• on an island close to the equator.

• in a tropical rainforest.

• in the dry areas of the western United States.

• in the eastern half of the United States.

What kind of soil is found in the C horizon of a soil profile?

• partially weathered parent material

• clay particles

• hardpan

• mineral and organic matter

In which of the following areas will soil formation be greatest?

• a steep slope in a warm, wet climate

• a flat area in a cold, wet climate

• a flat area in a warm, wet climate

• a north-facing area on a steep slope

   

The main source of organic matter in soil is

• water

• bacteria

• fungi

• plants

Tags

NGSS.MS-LS1-6

Which of the following statements about soil formation is true?

• The longer a soil has been forming, the thinner it becomes.

• Precipitation affects the rate at which nutrients are removed from soil.

• Hot, wet climates produce a thin layer of chemically weathered soil.

• Cold, dry climates produce a thick layer of mechanically weathered soil.