cold and hot places

hi this is for my biology, any help would be appreciated, thanks.

sea otters have a very thick, fine fur, why does this help to keep them buoyant??

vultures that like in the dersert excrete urine onto their legs - why does this method and how, lower the birds body temperature?

thankyou

Reply 1

GH

13

sarah_999

hi this is for my biology, any help would be appreciated, thanks.

sea otters have a very thick, fine fur, why does this help to keep them buoyant??

vultures that like in the dersert excrete urine onto their legs - why does this method and how, lower the birds body temperature?

thankyou

Traps a layer of air inside the fur.

Urine evaporates, therefore reduces body temperature, as blood pumps through the cool leg.

Reply 2

username9816

14

2776

cool leg.

Reply 3

Lucy

sarah_999

vultures that like in the dersert excrete urine onto their legs - why does this method and how, lower the birds body temperature?

Urine contains water. Water has a high latent heat of vaporisation i.e. it takes a lot of thermal energy to evaporate 1kg of water. Therefore the heat energy from the vulture is used to evaporate the water in the urine, effectively acting as a coolant.

cold and hot places

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