Energy

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  • Created by: kelz0209
  • Created on: 04-04-14 15:20
Name 4 ways this vacuum flask limits heat transfer and how?
1.Glass bottle double-walled with vacuum-conduction+convection through sides.2.Walls either side of vacuum silvered-heat loss by radiation.3.Bottle supported by insulating foam-heat conduction.4.Stopper-plastic-cork/foam-heat conduction.
1 of 5
Why do the hairs on your skin 'stand up' when you are cold?
To trap thick layer of insulating hair around the body. Limits amount of heat loss by convection.
2 of 5
Why do some people go pink when they're hot?
Body diverts more blood to flow near surface of skin- more heat can be lost by radiation.
3 of 5
Why do artic foxes have small ears?
The small ears provide a small surface area to minimise heat loss by radiation and conserve body heat.
4 of 5
Why do desert foxes have big ears?
The huge ears provide a large surface area to allow heat loss by radiation easily and keep cool.
5 of 5

Other cards in this set

Card 2

Front

Why do the hairs on your skin 'stand up' when you are cold?

Back

To trap thick layer of insulating hair around the body. Limits amount of heat loss by convection.

Card 3

Front

Why do some people go pink when they're hot?

Back

Preview of the front of card 3

Card 4

Front

Why do artic foxes have small ears?

Back

Preview of the front of card 4

Card 5

Front

Why do desert foxes have big ears?

Back

Preview of the front of card 5

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