The Arctic is one of the most ______ environments on our planet, making survival difficult., crowded, forbidding, inviting, engaging, Because there are no forests, ______ hunters learned to build shelters with snow., urban, stationary, nomadic, farming, When your body temperature drops, you are actually feeling heat ______ your body., increasing, leaving, staying, decreasing, Traditional igloo blocks are ______ enough to hold up, but light enough to insulate., dense, liquid, fast, loose, When you live in an igloo, your body acts as a living ______ to provide heat., furnace, battery, fridge, statue, When temperatures reach 50 degrees below zero, ______ means finding a good shelter., vacation, survival, arriving, farming.

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