Why is caribou fur a good insulator?

Answer 1

Polar bears have transparent fur over black skin. Reflection of the sunlight from the densely packed transparent hairs makes polar bears seem to be white. The bears' black skin absorbs heat from the sun. The transparent fur is made up of hollow hairs called guard hairs. These air-filled guard hairs help transmit heat from the sunlight to the polar bear's black skin as a solar heat collector. In turn, the reflection stops the heat being lost from their black skin. Their fur is also waterproof, so it helps keep the bears warmer when they are in water.

Answer 2

It is very thick so it is used a lot... If you were a caribou in cold snow you would want think fur rite? through adaptation they hav thick fer to keep heat in and not let cold in..aka the purpose of insulation

Umm, should people who can't spell "right" correctly be allowed to answer questions? Fur is a good insulator because each indivisual hair keeps air trapped against the skin of the animal, and air is an excellent insulator. The trapped air keeps the animal's body heat from escaping, keeping the animal warm. If you think about how many hairs are in a caribou's coat and how much air that would trap, you can see how it keeps the caribou warm. When people get cold we get goosebumps - this raises the hairs on our bodies in an attempt to keep us warm, like how the caribou's hairs keep it warm. Obviously though, humans have much less hair, so we cannot stay as warm.

Answer 3

A polar bear's fur is a pretty good insulator.