P2

Question 1

What materials are the best comdictors of thermal energy?

Answer 1

Metals

Question 2

Non metal materials such as wool and fibreglass are the best i——— of the thermal energy

Answer 2

Insulators

Question 3

The rate of thermal energy transfer through a material depends on what 3 things

Answer 3

The temperature difference across the material
The thickness of the material
The thermal conductivity of the material

Question 4

To reduce the rate of thermal energy transfer, the insulating material used should
List 2 things

Answer 4

Have as low a thermal conductivity as possible
Be as thick as possible

Question 5

Why are saucepans often made of metal with wooden handles?

Answer 5

The metal is a good conductor of thermal energy which will help the food cook and the wooden handle is a good insulator of thermal energy so will stop you getting burnt