Revising Heat Transfer

What are the three methods of heat transfer?

• Conduction

• Convection

• Absorption

• Radiation

What is another name for heat?

• chemical potential energy

• kinetic energy

• elastic potential energy

• thermal energy

We cook hotdogs in a pan of boiling water.

Which method of heat transfer moves heat from the infrared heater to the pan?

• conduction

• convection

• radiation

We cook hotdogs in a pan of boiling water.

Which method of heat transfer moves heat from the hot pan to water?

• conduction

• convection

• radiation

We cook hotdogs in a pan of boiling water.

Which method of heat transfer moves heat from water at the bottom of hot pan to all parts of water?

• conduction

• convection

• radiation

We cook hotdogs in a pan of boiling water.

Which method of heat transfer moves heat from hot water to the hotdog?

• conduction

• convection

• radiation

After all hotdogs are consumed, the pan of hot water is left to cool.

Which method of heat transfer moves heat from hot pan to the surrounding air?

• conduction

• convection

• radiation

After all hotdogs are consumed, the pan of hot water is left to cool.

Which methods of heat transfer moves heat from hot water to the surrounding air? (choose more than 1)

• conduction

• convection

• radiation

When water is heated, the hotter water at the bottom expands, becomes less dense and rises. The colder water at the top, which is more dense, sinks. This creates a cycle called ...

• conduction current

• convection current

• radiation whirl

When water boils, bubbles are formed at the bottom of the pan, before rising to the top. What causes these bubbles to form?

• Air bubbles trapped inside water.

• Oxygen gas trapped inside water.

• Water turning into vapour.

• Air bubbles trapped in micro surfaces of the pan.