Which of the following is correct regarding permafrost?
A)It develops where soil or rock temperatures are below freezing for at least two years.
B)It primarily occurs in areas covered with glaciers.
C)The surface layer of permafrost never thaws,even in the warm season.
D)It tends to occur at lower elevations in the midlatitudes than in the high latitudes.
E)The greatest areas of permafrost are found in the Southern Hemisphere.

Question

Quizplus · Accepted Answer

Permafrost is defined as soil or rock that remains at or below 0°C for at least two consecutive years.

Answer: C 
 The surface layer of permafrost is the active layer that thaws and refreezes each year, but there is a layer beneath it that remains permanently frozen.

Therefore, the correct choices are A and C.

Which of the Following Is Correct Regarding Permafrost