Check what I know: Thermal Processes · G3 Science Physics

Check what you know about thermal processes, practise what needs work, then check your progress and return for a later review.

SEC G3 Combined Science Physics component 2027

Learning goals

Work through the questions and use the feedback to plan revision.

Check what I know

Check what I know: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 8 minutes

Check what I know

Answer 6 short questions. This starting check helps choose what to work on; it does not prove mastery.

Recent attempts

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This check needs JavaScript to record answers. The reviewed questions are listed below for study.

Two copper blocks of different masses, initially at 80 °C and 20 °C, touch in an insulated box. Which statement is correct?

Cold transfers from the 20 °C block into the 80 °C block.
Energy transfers until both blocks have equal internal energy.
No transfer occurs because both objects are metal.
Energy transfers by heating from the 80 °C block to the 20 °C block until both have the same temperature.

Which microscopic description explains conduction through a solid metal?

The metal circulates in a convection current.
Lattice particles transfer energy through vibrations and interactions, while mobile electrons also carry energy through the metal.
Hot metal particles move bodily to the cooler end.
Only mobile electrons transfer energy; the lattice has no role.

Why does a heated region of fluid usually rise?

Heat itself rises and pulls the fluid behind it.
Its particles stop moving, so the region becomes lighter.
The same mechanism carries material through a solid.
It expands, becomes less dense than the surrounding fluid and is displaced upward as cooler, denser fluid moves in.

Why can energy from the Sun reach Earth across space?

Conduction carries energy through completely empty space.
Only shiny surfaces can transmit energy through a vacuum.
Thermal radiation is electromagnetic and does not require a material medium.
Space contains a convection current from the Sun.

For equal-area surfaces at the same temperature, which is normally the best emitter of thermal infrared radiation?

a polished copper surface
a dull black surface
a polished silver surface
all surfaces emit at identical rates

A saucepan is made with a metal base and a plastic handle. Which statement explains the choice of material for the handle?

Plastic conducts energy poorly, so far less energy reaches the cook's hand than would pass along a metal handle.
Plastic conducts energy better than metal, which is why the handle stays cool.
The handle is chosen for its low density rather than for how it conducts.
Any material would do, because the handle is not in contact with the hot base.

Practise

Practise: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

Two objects have reached thermal equilibrium. What can be concluded?

They have the same temperature and no net energy transfer by heating occurs between them.
They must contain equal internal energy.
Cold and heat now flow at equal net rates into both objects.
They must have equal mass and be made of the same material.

What happens to particles near the hot end of a non-metal solid?

They form a convection current inside the solid.
Only free electrons can transfer energy in any solid.
They vibrate more energetically and transfer energy to neighbouring particles through interactions.
They flow to the cold end and leave empty lattice sites.

Apart from colour and texture, which two listed properties affect a body's radiation-transfer rate?

surface temperature and surface area
surface temperature and the object's mass
surface area and the surrounding air pressure
the object's weight and the surrounding air density

Why does a foam sleeve reduce energy transfer from a hot cup?

It reduces transfer only by reflecting thermal radiation.
It contains poorly conducting material and trapped air, reducing conduction and restricting convection.
It is insulated, which is the complete explanation.
It increases convection by making the cup warmer.

A room has a heater near the floor and open vents near the floor and ceiling. Which airflow is expected once a steady convection current forms?

Warm less-dense air leaves through the upper vent while cooler denser air enters through the lower vent.
Warm air leaves through the lower vent because heating makes it denser.
Cool air enters through the upper vent and remains there without circulating.
No air moves because energy, rather than matter, is transferred.

A detector faces the same hot plate first across air and then across an evacuated gap. It warms in both trials. Which conclusion follows from the vacuum trial?

At least some energy reaches the detector by electromagnetic radiation, which needs no material medium.
Conduction becomes faster after the particles are removed.
The vacuum itself circulates and convects energy.
The second warming result is impossible because all transfer needs matter.

Practise

Practise after feedback: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

Two objects have reached thermal equilibrium. What can be concluded?

They have the same temperature and no net energy transfer by heating occurs between them.
They must contain equal internal energy.
Cold and heat now flow at equal net rates into both objects.
They must have equal mass and be made of the same material.

What happens to particles near the hot end of a non-metal solid?

They form a convection current inside the solid.
Only free electrons can transfer energy in any solid.
They vibrate more energetically and transfer energy to neighbouring particles through interactions.
They flow to the cold end and leave empty lattice sites.

Apart from colour and texture, which two listed properties affect a body's radiation-transfer rate?

surface temperature and surface area
surface temperature and the object's mass
surface area and the surrounding air pressure
the object's weight and the surrounding air density

Why does a foam sleeve reduce energy transfer from a hot cup?

It reduces transfer only by reflecting thermal radiation.
It contains poorly conducting material and trapped air, reducing conduction and restricting convection.
It is insulated, which is the complete explanation.
It increases convection by making the cup warmer.

A room has a heater near the floor and open vents near the floor and ceiling. Which airflow is expected once a steady convection current forms?

Warm less-dense air leaves through the upper vent while cooler denser air enters through the lower vent.
Warm air leaves through the lower vent because heating makes it denser.
Cool air enters through the upper vent and remains there without circulating.
No air moves because energy, rather than matter, is transferred.

A detector faces the same hot plate first across air and then across an evacuated gap. It warms in both trials. Which conclusion follows from the vacuum trial?

At least some energy reaches the detector by electromagnetic radiation, which needs no material medium.
Conduction becomes faster after the particles are removed.
The vacuum itself circulates and convects energy.
The second warming result is impossible because all transfer needs matter.

Check my progress

Check my progress: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 10 minutes

Check my progress

Answer 6 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Check again

Check again: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 10 minutes

Check again

Answer 6 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Review

Review: Thermal Processes · G3 Science Physics

A text-first thermal-process assessment with labelled controls and explicit temperatures, media, surfaces and transfer mechanisms.

About 10 minutes

Review

Answer 6 questions. A scheduled review can contribute to your course progress only when it is due and the result is accepted.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Course and syllabus information

Course: SEC G3 Combined Science Physics component
Edition: SEC G3 Combined Science Physics component 2027

Check what I know: Thermal Processes · G3 Science Physics

Check what I know: Thermal Processes · G3 Science Physics

Starting check complete

Practise: Thermal Processes · G3 Science Physics

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Practise after feedback: Thermal Processes · G3 Science Physics

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Check my progress: Thermal Processes · G3 Science Physics

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Check again: Thermal Processes · G3 Science Physics

Progress check complete

Review: Thermal Processes · G3 Science Physics

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