* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Weathering and Erosion Bball Answers
Survey
Document related concepts
Plant nutrition wikipedia , lookup
Soil respiration wikipedia , lookup
Surface runoff wikipedia , lookup
Terra preta wikipedia , lookup
Crop rotation wikipedia , lookup
Soil erosion wikipedia , lookup
Soil compaction (agriculture) wikipedia , lookup
Soil salinity control wikipedia , lookup
No-till farming wikipedia , lookup
Soil food web wikipedia , lookup
Canadian system of soil classification wikipedia , lookup
Soil horizon wikipedia , lookup
Sustainable agriculture wikipedia , lookup
Soil microbiology wikipedia , lookup
Transcript
All of the following EXCEPT __________ can weather rock. a. sunlight b. freezing and thawing c. animals d. plants When materials containing iron are exposed to water and oxygen, oxidation can occur. What kind of weathering causes the mineral composition of rocks to change? a. mechanical weathering b. permeable weathering c. chemical weathering d. general weathering Ice wedging causes mechanical weathering of rock by means of a. heating and cooling. b. plant growth. c. animal actions. d. freezing and thawing of water. Which is an example of chemical weathering? a) A rock breaking into fragments. b) A rock being scratched by rocks embedded in the bottom of a glacier. c) A rock dissolving in water. d) Sediment being moved down a hillside. Which does not contribute to the rate of weathering? a. Rock type c. Climate b. Rock composition d. Fossils Soil formation begins with the weathering of a. litter. b. bedrock. c. the A horizon. d. humus. If a river in flood picks up a house and moves it downstream, this is a) Chemical weathering b) Mechanical weathering c) Erosion d) All of the above Soil is a valuable resource because it a. is important to all living things on land. b. contains sand and gravel. c. is rich in decomposers. d. has all three soil horizons. Which factor has the least effect on the weathering of a rock? A) composition of the rock B) exposure of the rock to the atmosphere C) the number of fossils found in the rock D) climatic conditions In which horizon is humus concentrated? a. A – horizon c. C – horizon b. B – Horizon d. O – horizon Which describes a residual soil? a. Soil from sediment deposited by glaciers b. Sand that has collected in a floodplain c. Fine-grained sediment that was deposited by wind d. Layers of material that weathered from bedrock below Which of the following statements is NOT true of soil? a. It is a loose covering of broken rock particles and decaying organic matter. b. There is one kind of soil in the United States c. Living organisms add nutrient to it d. It takes a long time to form What is one source of organic matter in soil? a. Acid precipitation b. Weathered topsoil c. Dead fungi, bacteria, and protozoa d. eroding bedrock For which movement of earth materials is gravity not the main force? A) snow tumbling in an avalanche B) moisture evaporating from an ocean C) boulders carried by a glacier D) sediments flowing in a river Why is weathering an important process in soil formation? A. Weathered material is the main component in the soil. B. Weathering brings water into the soil layers. C. Weathered material provides the organic nutrients into the soil. D. Weathering removes the soil, and therefore prevents soil formation The color of a soil ___________. a. Is a reliable indicator of its fertility b. It always dark brown or black c. Is not dependent on the amount of humus d. Is determined by its composition and climate Which is considered NOT a factor of soil formation? a. Topography c. Time b. Parent material d. Chemistry Which is usually the primary factor that affects the rate of weathering? a. Topography c. Climate b. Volume d. Biological organisms Which of the following has the potential for the most erosion? a. Water flowing across a flatland b. Wind blowing materials in the air, again the force of gravity c. Wind blowing materials down a slope d. Water flowing down a steep slope In which of the following climates would chemical weathering most readily occur? a. Wet and warm c. Wet and cool b. Dry and warm d. Dry and cool The loss of topsoil to erosion is bad because a) Topsoil contains most of the nutrients. b) Topsoil protects the rich organic material beneath it. c) When the topsoil is gone it means that the entire soil profile has eroded away. d) All of the above Going down in a soil, each soil horizon downward becomes a) More altered from the original rock. b) Less altered and more like the original rock. c) Darker and more organic rich. d) A & C