Year 8
Convection
Explain the process of convection and give examples of convection currents.
Year 8
Convection
Explain the process of convection and give examples of convection currents.
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Lesson details
Key learning points
- Describe how heat transfers occur by convection
- Explain what is meant by a convection current
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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6 Questions
Q1.
If a heater blows hot air into a cool room, what happens to the hot air?
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.
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.
The frying pan would stay at the same temperature.
Q4.
If a material is good at transferring thermal energy, what can it be called?
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.
The particles are far away from each other in a fixed pattern.
Q6.
Which variable is measured in degrees Celsius?
6 Questions
Q1.
When a fluid is heated, which two things happen to the particles?
They collide less frequently.
They move slower.
Q2.
What happens to areas of cooler particles in a fluid?
They float.
They move more quickly.
They rise.
Q3.
What is a convection current?
Areas of cooler particles rising and hotter particles sinking.
Particles transferring energy.
Solids being heated.
Q4.
What is needed to produce a convection current in a beaker of water?
a stirrer
hot air
it cannot be produced
Q5.
Identify which of the following scenarios is an example of convection.
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 .