Form 2 - Heat conduction and insulation

What is heat conduction?

• The process of temperature transfer through a solid

• The process of heat transfer through radiation

• The process of heat transfer through a substance or material

• The process of slowing down heat transfer through a substance

Which of the following is a good conductor of heat?

• Plastic

• Glass

• Aluminium

• Rubber

What is the purpose of insulation?

• To allow heat to flow easily

• To prevent heat from flowing

• To increase heat transfer

• None of these answers

Why does a metal spoon left in a cup of hot tea get hot?

• The spoon conducts heat from the tea to your hand

• The spoon conducts heat from the tea to the other end of the spoon

• The spoon radiates heat to the tea

• None of these answers

Which of the following is an example of a poor conductor of heat?

• Iron

• Aluminium

• Gold

• Wood

What is the unit of thermal energy?

• Joules

• Watts

• degrees Celsius

• Joules per metre

What is meant by thermal equilibrium?

• The state when two objects are at the same temperature and no heat flows between them

• The state when two objects are at different temperatures and heat flows from the hotter object to the cooler object

• The state when two objects are at different temperatures and heat flows from the cooler object to the hotter object

• The state when two objects are at the same temperature and heat flows from the cooler object to the hotter object

Thermal energy is transferred to neighbouring particles when they _______.

A wooden handle on a pan is an example of __________.

Why does wearing a hat help to keep you warm on a cold day?

• The hat prevents heat from escaping from your head

• The hat traps a layer of air around your head, which reduces heat loss

• The hat conducts heat away from your head to the rest of your body

• None of these answers