Year 7

Convection

Explain the process of convection and give examples of convection currents.

Year 7

Convection

Explain the process of convection and give examples of convection currents.

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Lesson details

Key learning points

  1. Describe how heat transfers occur by convection
  2. Explain what is meant by a convection current

Licence

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6 Questions

Q1.
If a heater blows hot air into a cool room, what happens to the hot air?
Correct answer: The hot air rises.
The hot air sinks.
The hot air stays close to the heater.
The hot air stays level with the heater.
Q2.
Describe energy transfer by heating.
Energy transfers between kinetic energy stores.
Energy transfers from a cold area to a hot area.
Correct answer: Energy transfers from a hot area to a cold area.
Energy transfers from a radiator.
Q3.
If a cool frying pan was placed on a hot hob, what would happen?
The frying pan would cool down.
The frying pan would freeze.
Correct answer: The frying pan would heat up.
The frying pan would stay at the same temperature.
Q4.
If a material is good at transferring thermal energy, what can it be called?
Correct answer: a conductor
a heater
a thermometer
a transferrer
Q5.
Describe the particle arrangement in a gas.
The particles are close together but can move freely.
The particles are close together in a fixed pattern.
Correct answer: The particles are far away from each other and move randomly.
The particles are far away from each other in a fixed pattern.
Q6.
Which variable is measured in degrees Celsius?
Correct Answer: temperature

6 Questions

Q1.
When a fluid is heated, which two things happen to the particles?
They collide less frequently.
Correct answer: They collide more frequently.
Correct answer: They move faster.
They move slower.
Q2.
What happens to areas of cooler particles in a fluid?
They float.
They move more quickly.
They rise.
Correct answer: They sink.
Q3.
What is a convection current?
Areas of cooler particles rising and hotter particles sinking.
Correct answer: Areas of hotter particles rising and cooler particles sinking.
Particles transferring energy.
Solids being heated.
Q4.
What is needed to produce a convection current in a beaker of water?
a stirrer
Correct answer: an energy source
hot air
it cannot be produced
Q5.
Identify which of the following scenarios is an example of convection.
Correct answer: a boiler heating up water
a hot water bottle heating up a bed
a piece of bread being toasted
an empty frying pan heating up on a hob
Q6.
Convection currents occur in gases and .
Correct Answer: liquids, liquid