Thermal physics

The graph shows how the temperature of the substance changes with time.

• gas condensing

• gas cooling

• liquid cooling

• liquid solidifying

What is meant by the fixed points of the scale of a liquid-in-glass thermometer?

• the distance between one scale division and the next

• the maximum and minimum depth to which the thermometer should be submerged in a liquid

• the two agreed temperatures used for marking the temperature scale

• the highest and lowest temperatures that the thermometer can record

Which quantity gives the thermal capacity of a beaker?

• the thermal energy required to raise the temperature of the beaker by 1°C

• the total volume of hot liquid that the beaker can hold

• the total mass of hot liquid that the beaker can hold

• the thermal energy required to change the state of the beaker at constant temperature

Which quantity gives the thermal capacity of a beaker?

• the thermal energy required to change the state of the beaker at constant temperature

• the total volume of hot liquid that the beaker can hold

• the total mass of hot liquid that the beaker can hold

• the thermal energy required to raise the temperature of the beaker by 1°C

The table lists the melting points and the boiling points of four different substances. Which substance is a liquid at 0°C?

• A

• B

• D

• C

A long thin bar of copper is heated evenly along its length.

• It becomes less heavy.

• It becomes longer.

• It becomes shorter.

• It bends at the ends.

A solid object has a very large thermal capacity. What does this mean?

• A large amount of energy is needed to make the object become hot.

• A large amount of energy is needed to make the object melt.

• A small amount of energy is needed to make the object become hot.

• A small amount of energy is needed to make the object melt.

Which statement about evaporation is correct?

• Evaporation causes the temperature of the remaining liquid to decrease.

• Evaporation does not occur from a cold liquid near its freezing point.

• Evaporation does not occur from a dense liquid, such as mercury.

• Evaporation occurs from all parts of a liquid.

Which statement describes what happens as ice at 0°C starts to melt to become water?

• Energy is absorbed and the temperature remains constant.

• Energy is absorbed and the temperature rises.

• Energy is released and the temperature remains constant.

• Energy is released and the temperature rises.

What is Conduction?

• When you heat fluid particles gain energy, so they move more and spread out.

• particles are very close together, so they can transfer heat energy as they vibrate.

• The particles between the Sun and the earth travel by conduction

• the steady flow between the warm and cool sections of a fluid, such as air or water.