1.5 - Convection

Question 1

In which states of matter does convection occur in?

Answer 1

Fluids - liquids and gases

Question 2

Describe the process of convection (4)

Answer 2

• When a fluid is heated it expands
• The fluid becomes less dense and rises
• The warm fluid is replaced by cooler, denser fluid
• The resulting convection current transfers energy through the fluid

Question 3

What is an example of convection currents on a small scale?

Answer 3

Heating water in a beaker

Question 4

What is an example of convection currents on a large scale?

Answer 4

Heating the air above land and sea - they are responsible for onshore and offshore breezes