Answer: D. It can melt to a depth of a few meters in summer, then refreeze in winter.
Explanation:
Permafrost is ground which remains frozen for two or more years. Permafrost consists of soil, rock and sand fused together by ice. Mostly found in areas in high altitude, the Arctic, Antarctica, it is common in periglacial environments where temperatures are below freezing
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The topmost layer of permafrost can melt in summer and refreeze in winter. This thawing and refreezing produces a ground pattern called columnar joints similar to the one formed when molten lava cools.
Answer: "cluster" .
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When seen at night, it is described as a "milky spot in the sky".
This term was coined by Ancient Romans.
Answer:
can you send a picture of this question, because I can't read all the answers.
Autonomous Region. This is the correct answer.
