What processes lead to soil degradation? What will be an ideal response?
Soil is lost by erosion, a process that is usually balanced by soil formation. However, removing natural
vegetation by plowing, overgrazing, and excess deforestation has increased the soil erosion rate
substantially. Soil undergoes chemical deterioration when its nutrients are depleted, and its
productivity decreases. Pollutants can also bring about the chemical deterioration of soil. Soil
deteriorates physically when it is compacted by heavy machinery and livestock, especially cattle. Soil
must be taken care of by avoiding the practices mentioned above.
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Black coffee is best classified as
A. a suspension B. a heterogeneous mixture C. a solution D. an element E. a compound
Rocks that contain crystals that are roughly equal in size which can be identified without a microscope are said to exhibit this texture.
a) fine grained b) glassy c) porphyritic d) coarse grained e) pyroclastic
A ________ is a break in the Earth's surface or crust with horizontal or vertical displacement
Fill in the blank(s) with the appropriate word(s).
Which of the following are NOT present on the Moon?
A. light-colored areas called the lunar highlands B. areas with abundant impact craters C. large impact craters with light-colored rays radiating out from the center D. dark, fairly smooth areas E. All of these are present.