17. The cone-shaped piles of debris on mountainsides, caused by falling rocks, a

Question

17. The cone-shaped piles of debris on mountainsides, caused by falling rocks, are called A) talus 8) regolith C) apexes D) playas 18. The western United States, the Mississippi Valley, the Midwest, and Florida are all currently experiencing significant cases of A) expanding glaciers B) geyser eruptions C) frost action D) drawdown 19.70% of Earth's fresh water comes in the form of A) groundwater B) glaciers C) streams D) lakes 20. Which of the following is associated with Karst topography? A) geysers B) hot springs C) sinkholes D) hydrofracking 21.98% of earth's water comes in the form of A) water vapor B) sweat and tears C) ice D) salt water 22. Houston suffers from continued as a result of A) land subsidence; groundwater mining and oil drilling B) land subsidence; having too much groundwater after heavy storms ? C) landslides; chemical weathering D) landslides, induced mass wasting 23. When soil and regolith in the sides of hills move very slowly downward (a few millimeters per day or year), this is known as A) creep B) rockfalls C) runoff D) aeration

Explanation / Answer

1)As rocks break up and fall directly downward which produces coneshaped pile of debris called a talus.

2)YELLOWSTONE volcanic eruption could send a wave of lava and ash towards millions of Americans in Mississippi valley and florida against geyers eruption.

3)Most of the Earth's water is saline, 97.5 percent which comes from oceans with only 2.5 percent fresh and about 70 percent is confined in glaciers and permanent snow

4)Groundwater and Karst Topography relates a geyser which is a hot spring that erupts periodically, shooting water and steam into the air.

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