How does the rate of seafloor spreading affect sea level?
A. Faster spreading heats up ocean waters causing them to expand and flood the land.
B. Faster spreading produces broader ridges that displace water out of the oceans.
C. They have no effect because the rates of seafloor spreading do not change over time.
D. Faster spreading causes faster subduction, which pulls down continental margins.
Answer: B
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The Earth is tilted at an angle of 23.5° with respect to the plane of its orbit around the sun. Which of the following describes what would happen in middle latitudes if the angle was increased to 40°?
A. hotter summers and colder winters than at present B. cooler summers and milder winters than at present C. hotter summers and milder winters than at present D. cooler summers and colder winters than at present
Desertification is usually accompanied by decreased erosion
Indicate whether the statement is true or false.
The most common way for air to be cooled in order that a cloud may form is by:
A) rising and expanding. B) sinking and contracting. C) emitting radiation. D) reflecting radiation. E) evaporating water.
Which of the following is NOT part of the ecological value of forests?
a. Erosion prevention b. Decreased flooding c. Carbon storage d. All of the above are values of forests.