Question 1

Which of the following is the BEST example of heat transfer by conduction?

Accepted Answer

A pot of water heating on a stovetop

Answer

Hot air rising from a fireplace

Answer

Sunlight warming the Earth's surface

Answer

Feeling the warmth of a bonfire

Question 2

Why does a metal spoon feel colder to the touch than a wooden spoon at room temperature?

Accepted Answer

Metal conducts heat away from your hand faster than wood.

Answer

Metal absorbs more radiation from the surroundings.

Answer

Metal is a better insulator than wood.

Answer

Metal has a lower specific heat capacity than wood.

Question 3

Which statement about convection is TRUE?

Accepted Answer

Convection currents are created by density differences in fluids.

Answer

Convection involves the transfer of heat through electromagnetic waves.

Answer

Convection is driven by the movement of particles in a solid.

Answer

Convection only occurs in liquids.

Question 4

How does a thermos flask minimise heat loss?

Accepted Answer

All of the above

Answer

It uses a layer of air to prevent conduction.

Answer

It has a reflective inner surface to reduce radiation.

Answer

It creates a vacuum to prevent convection.

Question 5

Which of the following is an example of heat transfer by radiation?

Accepted Answer

The Earth receiving heat from the Sun

Answer

Cooking food in a convection oven

Answer

Warming your hands by rubbing them together

Answer

Feeling the heat from a radiator

Question 6

Thermal equilibrium is reached when:

Accepted Answer

Heat transfer between two objects stops.

Answer

Two objects are at different temperatures.

Answer

Convection currents are present.

Answer

One object is hotter than the other.

Question 7

What is specific heat capacity?

Accepted Answer

The amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius

Answer

The temperature at which a substance boils

Answer

The density of a substance at a specific temperature

Answer

The amount of heat required to melt 1 gram of a substance

Question 8

Which of the following materials has the HIGHEST thermal conductivity?

Accepted Answer

Copper

Answer

Glass

Answer

Rubber

Answer

Wood

Question 9

How does the specific heat capacity of water compare to that of air?

Accepted Answer

Water has a higher specific heat capacity than air.

Answer

Water and air have the same specific heat capacity.

Answer

The specific heat capacity of water and air cannot be compared.

Answer

Water has a lower specific heat capacity than air.

Question 10

Why are expansion gaps left between sections of concrete in pavements?

Accepted Answer

To prevent the concrete from cracking due to thermal expansion

Answer

To make construction easier

Answer

To reduce noise from traffic

Answer

To allow for water drainage

Question 11

A hot metal rod is placed in a container of cold water. Which of the following statements is TRUE?

Accepted Answer

The temperature of the water will increase, and the temperature of the metal rod will decrease until they reach thermal equilibrium.

Answer

Heat will flow from the water to the metal rod.

Answer

The metal rod will melt.

Answer

No heat transfer will occur.

Question 12

What causes land breezes to occur at night?

Accepted Answer

Land cools down faster than water, causing cool air to flow from the land to the sea.

Answer

Water cools down faster than land, causing cool air to flow from the sea to the land.

Answer

Land breezes are not related to temperature differences.

Answer

The Sun's heat during the day creates a temperature difference that drives the breeze.

Question 13

Which of the following is an example of forced convection?

Accepted Answer

An electric fan blowing air

Answer

A hot air balloon rising in the air

Answer

Water boiling in a pot

Answer

Hot air rising from a chimney

Question 14

Why is aluminium a good material for cooking pans?

Accepted Answer

It is a good conductor of heat and distributes heat evenly.

Answer

It is lightweight and durable.

Answer

It is a poor conductor of heat.

Answer

It has a low specific heat capacity.

Question 15

Which of the following statements about thermal radiation is FALSE?

Accepted Answer

Radiation can only travel through a medium.

Answer

Dark-coloured objects absorb and emit more radiation than light-coloured objects.

Answer

The rate of radiation increases as the temperature of an object increases.

Answer

All objects emit thermal radiation.

Question 16

Why do we feel warmer when we wear dark-coloured clothing on a sunny day?

Accepted Answer

Dark colours absorb more radiation from the Sun and convert it to heat.

Answer

Dark colours are better insulators.

Answer

Dark colours reflect more sunlight.

Answer

Dark colours prevent convection currents from forming.

Question 17

What is the role of a refrigerant in a refrigerator?

Accepted Answer

It absorbs heat from the cold food and releases it to the warmer surroundings.

Answer

It generates heat to keep the food warm.

Answer

It insulates the refrigerator to prevent heat loss.

Answer

It circulates air to create convection currents.

Question 18

What happens to the density of a fluid when it is heated?

Accepted Answer

The density decreases.

Answer

The density increases.

Answer

The density changes randomly.

Answer

The density remains the same.

Question 19

Which of the following situations illustrates the concept of latent heat?

Accepted Answer

Ice melting at 0°C

Answer

A metal spoon getting hot when placed in boiling water

Answer

A car engine getting hot after running for a while

Answer

Warm air rising from a heater

Question 20

How is the movement of tectonic plates related to heat transfer?

Accepted Answer

Convection currents in the mantle, driven by heat from the Earth's core, cause plates to move.

Answer

Tectonic plate movement is unrelated to heat transfer.

Answer

Radiation from the Earth's core causes plates to shift.

Answer

Conduction from the Sun's heat drives plate movement.

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