Weathering And Erosion

d. none of the above

c. Artificial erosion causes a loss of fertile soil

a. it helps create fertile soil

b. acid rain falling on the sidewalk

false

true

c. coastline

b. physical weathering

a. Physical and Chemical are two types of weathering.

Areas with less vegetation would experience a greater amount of erosion. Vegetation acts as an anchor for soil, keeping it from being blown or washed away as easily. Areas with access to glaciers and water will also experience more erosion than areas without glacier or water access.

Weathering and erosion both occur naturally. Weathering is caused by exposure to heat, ice, and elements in the atmosphere. Erosion is caused by movement of wind and water. Rocks are broken down by a combination of weathering and erosion

Even though erosion happens naturally, erosion caused by human action is a concern. Natural erosion happens gradually over long periods of time. The changes to ecosystems that occur through natural erosion are gradual as well, so ecosystems are able to adapt. Artificial erosion, however, occurs 10 to 15 times more rapidly than natural erosion. This makes it difficult for ecosystems to adjust to the changes.

b. wind

Chemical weathering occurs when rocks, soil, or minerals are broken down through reactions with chemicals that are in the air or are biologically introduced. These chemicals can occur naturally or be the result of human action. Physical weathering occurs when rocks, soil, or minerals are broken down through mechanical means. Heat, ice, or pressure can result in cracking of rocks

a process by which rocks are broken down by direct contact with the atmosphere

Soil is held in place by trees and other plants. Deforestation removes the trees from an area, leaving the soil without that anchor. This causes the soil to be more susceptible to erosion.

a. atmospheric or biologically produced chemicals

b. upwelling of magma from the asthenosphere

c. they affect rainfall by creating a rain shadow

b. convergent

b. the crust provides raw materials necessary for life

b. wind

d. all of the above

true

Subduction zones are formed at convergent boundaries when tectonic plates collide. If one of the plates slides under the other plate, a subduction zone is formed.

Biogeochemical cycles and the rock cycle allow nutrients to be recycled through the abiotic and biotic zones of Earth. They are responsible for the cycling of oxygen, carbon dioxide, phosphorus and nitrogen between the biosphere and the rest of Earth.

c. underwater earthquakes

d. all of the above