Thermal Energy (OCR GCSE Physics A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
In which direction does heat energy naturally flow between two areas?
In which direction does heat energy naturally flow between two areas?
From higher to lower temperature
What are the three main methods of heat transfer?
What are the three main methods of heat transfer?
Conduction, convection, radiation
Through which state of matter does conduction transfer thermal energy?
Through which state of matter does conduction transfer thermal energy?
Solids
How does thermal energy spread through a solid during conduction?
How does thermal energy spread through a solid during conduction?
Vibrations pass from particle to particle
Why are metals excellent conductors of heat?
Why are metals excellent conductors of heat?
They have free electrons that carry energy
Through which states of matter does convection transfer heat?
Through which states of matter does convection transfer heat?
Fluids (liquids and gases)
What happens to a fluid when it is heated during convection?
What happens to a fluid when it is heated during convection?
It expands and becomes less dense
In a convection current, which fluid rises and which sinks?
In a convection current, which fluid rises and which sinks?
Warmer rises, cooler sinks
How is heat transferred by radiation?
How is heat transferred by radiation?
Through electromagnetic waves
What is unique about radiation compared to conduction and convection?
What is unique about radiation compared to conduction and convection?
It does not require a medium
How does the temperature of an object affect the radiation it emits?
How does the temperature of an object affect the radiation it emits?
Hotter objects emit more radiation
Why is air a poor conductor of heat used in insulation?
Why is air a poor conductor of heat used in insulation?
Its particles are far apart