Weathering, Soil, and Erosion Ch. 7 & 8 Review Questions

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is: A. erosion B. cracking and peeling C. abrasion D ice wedging

What kind of weathering causes the mineral composition of rocks to change? A. mechanical B. permeable C. chemical D. general

A hot and wet climate causes weathering to take place A. slowly B. at the same rate as when the limate is dry and cool C. unevenly D. rapid

Soil formation begins with the weathering of A. litter B. rock C. the A horizon D. humus

The mixture of rock particles, minerals, decayed organic material, air, and water is called: A. gravel B. litter C. silt D. soil

The decayed organic material in soil is called: A. silt B. litter C. humus D. clay

Which soil particle is the largest? A. gravel B. sand C. silt D. clay

Which soil particle is the smallest? A. sand B. gravel C. clay D. silt

The layer of soil in which topsoil is found is the A. A horizon B. B horizon C. C horizon D. bedrock

Most of the work of mixing humus within the soil is done by: A. fungi B. ants C. earthworms D. bacteria

The solid layer of rock beneath the soil is called: A. bedrock B. gravel C. the B horizon D. subsoil

The process by which natural forces move weathered rock and soil from one place to another is called A. soil conservation B. deposition C. abrasion D. erosion

The process in which sediment is laid down in a new location is called: A. weathering B. deposition C. erosion D. mass movement

Landslides, mudflows, slump, and creep are all examples of A. mechanical weathering B. runoff C. mass movement D. soil formation

Mass movement is caused by A. plucking and abrasion B. gravity C. chemical weathering D. erosion and deposition