Transfer of thermal energy — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

31 Which region of the electromagnetic spectrum is often involved in heat transfer by radiation? A infra-red B radio C ultraviolet D X-ray

1 marks

Answer: A

This question in 0973/11 May/June 2019

33 A hot water tank is fitted with two identical heaters P and Q. Heater P is fitted above heater Q as shown. The tank is full of cold water. heater P heater Q When only heater Q is switched on, it takes a long time to heat the tank of water to 60 °C. What happens to the cold water when only heater P is switched on? A All the water reaches 60 °C in less time. B All the water reaches 60 °C in the same time. C The water below heater P reaches 60 °C in less time. D The water above heater P reaches 60 °C in less time.

1 marks

Answer: D

This question in 0973/11 May/June 2020

32 A hot water tank is fitted with two identical heaters P and Q. Heater P is fitted above heater Q as shown. The tank is full of cold water. heater P heater Q When only heater Q is switched on, it takes a long time to heat the tank of water to 60 °C. What happens to the cold water when only heater P is switched on? A All the water reaches 60 °C in less time. B All the water reaches 60 °C in the same time. C The water below heater P reaches 60 °C in less time. D The water above heater P reaches 60 °C in less time.

1 marks

Answer: D

This question in 0973/12 May/June 2020

31 Which material is a bad thermal conductor? A aluminium B brass C copper D wood

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2020

33 Which row shows a good thermal conductor and a bad thermal conductor? good conductor bad conductor A copper air B copper silver C water air D water silver

1 marks

Answer: A

This question in 0973/11 May/June 2021

32 There is a vacuum between the double walls of a vacuum flask. Which of the methods of thermal energy transfer are prevented by the vacuum? A conduction only B conduction and convection C convection only D radiation only

1 marks

Answer: B

This question in 0973/12 May/June 2021

33 Water in a metal pan is heated on a gas burner. What are the main methods by which heat is transferred through the metal pan to the water and throughout the water? A conduction through the metal pan and convection in the water B convection through the metal pan and conduction in the water C convection through the metal pan and radiation in the water D radiation through the metal pan and conduction in the water

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2021

33 A hot metal ball is placed in a small hollow in a piece of wood. Two thermometers are placed equal distances from the ball, one at position P and one at position Q. Q hot metal ball P wood Which thermometer gives the higher reading and why? higher reading reason A thermometer at P the air conducts heat sideways, not upwards B thermometer at P the wood conducts heat sideways, not upwards C thermometer at Q convection carries heat upwards, not sideways D thermometer at Q infrared rays always carry heat upwards, not sideways

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2022

32 Two methods of cooking are grilling under a red-hot heater and frying in a shallow metal pan. heater food shallow metal pan air food method 1: grilling method 2: frying How does thermal energy pass through the air to reach the food in method 1 and how does thermal energy pass through the bottom of the metal pan in method 2? method 1 method 2 A convection conduction B convection radiation C radiation conduction D radiation radiation

1 marks

Answer: C

This question in 0973/12 May/June 2023

33 How is thermal energy transferred from the Sun through the vacuum of space? A by conduction and convection B by convection and radiation C by convection only D by radiation only

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2023

33 A beaker contains water that is all at 20 C. A convection current is started in the water, as shown in the diagram. Four points are labelled W, X, Y and Z. W X water Z Y Which two actions can each, on their own, cause this convection current? A cooling the water at W or heating the water at Y B cooling the water at W or heating the water at Z C cooling the water at X or heating the water at Y D cooling the water at X or heating the water at Z

1 marks

Answer: D

This question in 0973/11 May/June 2024

32 Which material is a poor thermal conductor? A air B aluminium C copper D iron

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2024

31 Which statement about the transfer of thermal energy is correct? A Thermal energy transfer by radiation involves mainly ultraviolet radiation. B Thermal energy transfer by radiation requires a medium to travel through. C The main method of thermal energy transfer through gases is conduction. D The main method of thermal energy transfer through liquids is convection.

1 marks

Answer: D

This question in 0973/11 May/June 2025

32 Which pair consists of one good thermal conductor and one bad thermal conductor? A aluminium and wood B brass and copper C glass and plastic D iron and steel

1 marks

Answer: A

This question in 0973/11 May/June 2025

32 The diagram shows a type of double glazing in a window. The double glazing consists of two sheets of glass separated by a vacuum. glass glass vacuum Which methods of energy transfer are prevented by the vacuum? A conduction and convection only B conduction and radiation only C convection and radiation only D conduction, convection and radiation

1 marks

Answer: A

This question in 0973/12 May/June 2025

32 What is a method for the transfer of thermal energy through a vacuum? A conduction B convection C insulation D radiation

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2025