Permafrost occurs at depths that range from a few centimeters to a few meters below the ground surface.
Answer the following statement true (T) or false (F)
True
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Which of the following describes why a fluffy covering of snow is able to protect sensitive plants and their root systems from damaging low temperatures?
A. Snow is a good insulator. B. Melting snow releases latent heat. C. Snow is a good emitter of infrared energy. D. Snow is a good reflector of sunlight.
What is not thought to have an effect on the formation of submarine canyons?
a. The sea level b. Turbidity currents c. Earthquakes d. Geothermal heating
Which of the following primary pressure areas are produced by dynamic factors, rather than thermal factors?
A) subtropical high and subpolar low B) equatorial low and polar high C) equatorial low and Bermuda high D) Aleutian low and Icelandic low
Before conservation efforts facilitated their comeback, the American alligator population was nearly completely wiped out primarily because of ____.
A. parasites B. diseases C. hunters D. land developers E. pollution