IGCSE Physics Chapter 11: Thermal Energy Transfer Part 1

Which of the following best describes thermal conduction?

• A) The transfer of thermal energy by electromagnetic waves

• B) The transfer of thermal energy through a fluid medium

• C) The transfer of thermal energy through direct contact of particles

• D) The transfer of thermal energy due to the movement of charged particles

Which material would be the best conductor of heat?

• A) Wood

• B) Glass

• C) Plastic

• D) Copper

Which of the following statements about thermal conduction is correct?

• A) Heat always flows from a cold object to a hot object.

• B) Thermal conduction can only occur in solids.

• C) The rate of thermal conduction increases with increasing temperature difference.

• D) Insulators are better conductors of heat than conductors.

Which of the following materials is an insulator and has poor thermal conduction properties?

• A) Aluminum

• B) Silver

• C) Rubber

• D) Iron

When you touch a metal spoon that has been sitting in a hot cup of tea, why does the spoon feel hot?

• A) The metal spoon is a good insulator, so it traps heat.

• B) The metal spoon is a good conductor, so it transfers heat to your hand.

• C) The metal spoon reflects heat onto your hand.

• D) The metal spoon absorbs heat from the air.

Which of the following is an example of conduction?

• A) Heat from the Sun reaching the Earth through space.

• B) The movement of hot air rising above a heater.

• C) Cooking food in a microwave oven.

• D) Touching a hot pan and feeling the heat.

Why is it more comfortable to sit on a wooden chair in a cold room rather than on a metal chair?

• A) Metal is a good conductor, so it keeps you warm.

• B) Wood is a good insulator, so it traps heat.

• C) Wood has a lower specific heat capacity.

• D) Metal has a higher specific heat capacity.

Why are metals good thermal conductors?

• A) Metals have low density, allowing heat to pass through easily. .

• B) Metals have high specific heat capacity, enabling them to store more heat.

• C) Metals have closely packed free electrons, which can transfer heat rapidly.

• D) Metals have high thermal resistance, reducing heat flow

What property of metals allows them to efficiently conduct heat?

• A) High reflectivity to infrared radiation

• B) Low density and mass

• C) High coefficient of linear expansion

• D) Free electrons that can move and transfer thermal energy

Compared to non-metallic materials, why do metals generally feel colder when touched in a room at the same temperature?

• A) Metals have lower specific heat capacity.

• B) Metals have higher emissivity, leading to increased heat loss.

• C) Metals have a higher thermal conductivity, drawing heat away from the hand faster.

• D) Metals have a higher melting point, so they stay cooler for longer.