Environmental

Permafrost in Alaska is defined as:

AFrozen topsoil that thaws every spring
BGround that remains at or below freezing temperature for two or more consecutive years✓ Correct
CPermanently frozen water bodies
DIce sheets covering the Alaska Range

Explanation

Permafrost is ground (soil or rock) that remains at or below 0°C (32°F) for at least two consecutive years. It underlies approximately 80% of Alaska and creates significant challenges for construction, including foundation instability when permafrost thaws.

Related Alaska Environmental Questions

Practice More Alaska Real Estate Questions

1,500+ questions covering all exam topics. Start free — no signup required.

Take the Free Alaska Quiz →