Science 7 - Heat Transfer

If two containers of water are heated, one with a large volume and the other with a small volume, both starting at the same temperature, which statement is correct regarding the temperature increase?

• The larger container will heat up faster.

• The smaller container will heat up faster.

• Both containers will heat up at the same rate.

• The temperature increase depends solely on the heat source.

When a metal spoon and a plastic spoon are both placed in a hot cup of coffee for the same amount of time, which is true regarding their temperature after the same amount of heat is applied?

• The metal spoon will feel cooler due to its lower specific heat.

• Both spoons will feel the same temperature due to equal heat absorption.

• The metal spoon will feel cooler because it has a higher thermal conductivity.

• The plastic spoon will feel cooler because it has a higher thermal conductivity.

A ceramic block and a metal block of the same size are placed in an oven at the same temperature. After heating for an hour, the ceramic block feels cooler to the touch. Why?

• The ceramic block has a higher specific heat capacity.

• The ceramic block reflects more heat than the metal block.

• The metal block is better at absorbing heat.

• The metal block has h

You are boiling two pots of water on a stove. One pot contains a large amount of water, and the other pot contains a small amount. Both pots are heated with the same heat source for the same amount of time. Which pot of water will reach a higher temperature, and why?

• The pot with more water will reach a higher temperature because it absorbs more heat.

• Both pots will reach the same temperature because they are heated for the same amount of time.

• The pot with more water will reach a lower temperature because it takes more heat to warm up.

• The pot with less water will reach a higher temperature

The following are the advantageous and disadvantageous applications of conduction, convection, and radiation.

                                I.            Conduction in frying pans to transfer heat for cooking

                              II.            Heat loss through poorly insulated walls in buildings

                           III.            Convection currents in a radiator to evenly distribute heat

                           IV.            Sunburn caused by excessive exposure to solar radiation

                             V.            Heat transfer from a stove burner to water in a pot via convection currents

• I, II, IV

• II, IV

• I, II, III

• IV, V

Which of the following best describes the process of heat transfer by conduction?

• Heat transfer through the movement of air or liquid.

• Heat transfer through electromagnetic waves, like sunlight.

• Heat transfer through direct contact between materials.

• Heat transfer through the change in the temperature of gases.

A metal spoon is placed in a hot cup of tea. After a few minutes, the spoon feels hot. Which type of heat transfer is occurring?

• Conduction

• Convection

• Radiation

• Insulation

You are given the following temperatures for different materials left in a room: If the room temperature is 20°C, which material will lose heat the fastest?

                                                      I.      Metal bar: 50°C

                                                            II.      Wooden stick: 25°C

                                                     III.      Plastic cup: 30°C

• Wooden stick

• Metal bar

• Plastic cup

• All materials lose heat at the same rate

What is the correct definition of heat in terms of energy transfer between objects?

• The total amount of matter contained within an object, regardless of its temperature.

• The process by which energy is transferred from an object at a higher temperature to an object at a lower temperature.

• A measure that tells us how hot or cold an object is in relation to another.

• The energy stored within an object due to its position or movement.

If you use a thermometer to measure something, what exactly are you determining about the object or substance?

• The amount of heat energy it contains.

• The pressure it exerts on its surroundings.

• The amount of light energy it absorbs or reflects.

• The measure of how fast its particles are moving, indicating its temperature.