2 What is the effect of adding heat to a substance at its boiling point? A Temperature increases B Temperature decreases C Temperature remains constant D Substance solidifies
4 Which of the following is a reason for using a vacuum in a thermos flask? A Prevents conduction and convection B Prevents radiation C Increases heat transfer D Reduces weight
5 What is the relationship between heat and temperature? A They are the same B Heat is a form of energy, temperature is a measure C Temperature is a form of energy, heat is a measure D They are unrelated
9 Which of the following is a disadvantage of thermal expansion? A Mercury rising in a thermometer B Bridges expanding in summer C Bimetallic strips in thermostats D Rail tracks buckling
12 Which of the following is an example of conduction? A A metal spoon getting hot in a cup of tea B Warm air rising from a heater C Feeling the sun's warmth on your skin D A microwave heating food
13 What happens to the volume of most substances when heated? A Increases B Decreases C Remains the same D First decreases then increases
14 Which method of heat transfer does NOT require a medium? A Conduction B Convection C Radiation D All require a medium
15 Which of the following is an example of radiation? A Boiling water B Feeling heat from the sun C Touching a hot stove D Warming hands near a fire
16 What is the heat required to raise the temperature of 1 kg of a substance by 1°C called? A Specific heat capacity B Latent heat C Thermal capacity D Heat of fusion
17 Which of the following is a measure of the average kinetic energy of particles in a substance? A Heat B Temperature C Thermal energy D Internal energy
18 What is the process by which heat is transferred through empty space? A Conduction B Convection C Radiation D Insulation
20 Which of the following is the best emitter of thermal radiation? A White surface B Shiny surface C Black surface D Transparent surface
21 Which of the following materials has the highest specific heat capacity? A Iron B Water C Aluminum D Lead
22 Which of the following is an application of convection? A Heating a metal rod B Breezes near the sea C Radiator warming a room D Both B and C
23 Which of the following surfaces is the best radiator of heat? A Shiny surface B Black surface C White surface D Polished surface
24 What is the temperature of a substance when it is neither gaining nor losing heat? A Thermal equilibrium B Absolute zero C Boiling point D Freezing point
25 Which of the following is a good conductor of heat but a poor conductor of electricity? A Copper B Diamond C Iron D Silver