Unit 5 Pre-Assessment

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light or infrared radiation, without the need for a medium.

Front

What is the boiling point of water on the Kelvin scale?

Back

373.15 K

Front

How does a rock get hot during the day?

Back

A rock gets hot due to radiation, as it absorbs heat from the sun.

Front

Why does the temperature stay the same during the melting of a substance?

Back

The temperature stays the same because the energy is used to break the bonds between molecules, not to increase temperature.

Front

How does heat transfer occur?

Back

Heat transfers from hot objects to cold objects.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What is the difference between conduction and convection?

Back

Conduction occurs through direct contact, while convection involves the movement of fluids.

Front

What is the significance of the melting point in experiments?

Back

The melting point is the temperature at which a solid becomes a liquid, indicating a phase change.

Front

What happens to temperature during a phase change?

Back

During a phase change, the temperature remains constant as energy is used to change the state of the substance.