Trivia: What term refers to ground that remains frozen?
Permafrost
Graupel
Fjord
Isocline
The correct answer is Permafrost
So why is this answer correct? : Permafrost is any ground that is completely frozen for at least two consecutive years. In the northern hemisphere, regions where permafrost can occur make up around 25% of the land area. The thickness of permafrost can vary from less than three feet to nearly 5,000 feet. However, these frozen layers are not always easy to spot or covered with snow, and can be covered with an active layer of soil that regularly thaws and refreezes.