CP3C Keeping warm

Question 1

What is insulation

Answer 1

It slows down the rate at which energy is transferred out of a house by heating

Question 2

Energy can be transferred by heating in different ways

What is conduction and what is an example

Answer 2

Vibrations are passed on between particles in a solid

Metals are good thermal conductors and wood is a poor conductor

Question 3

What is convection

Answer 3

In convection part of a fluid that is a warmer than the rest rises and sets up a convection current

Question 4

What is radiation and what is infrared radiation

Answer 4

The only way in which energy can be transferred through a vacuum

Infrared radiation can pass through gases and some solid materials. It is absorbed and emitted easily by dull dark surfaces and is absorbed/emitted poorly by light shiny surfaces

Question 5

Is the thermal conductivity in straw bales low or high

Answer 5

Low meaning that energy is not transferred through easily by heating