Unit 2: Materials (Properties and Changes)

The temperature when a liquid becomes gas is called ...

• freezing point

• turning point

• melting point

• boiling point

The temperature when a solid becomes liquid is called ...

• freezing point

• turning point

• melting point

• boiling point

Which substance has the highest boiling point?

• water

• sodium carbonate

• sodium chloride

• iodine

Which substance has the lowest boiling point?

• water

• methane

• sodium chloride

• sodium carbonate

Which substance has the lowest melting point?

• water

• methane

• sodium chloride

• sodium carbonate

Which substances are liquid at room temperature?

• water

• methane

• sodium chloride

• iodine

Is boiling and evaporation the same?

• YES

• NO

Substances that can transfer heat well are called ... conductors.

• thermal

• electrical

• magnetic

• movement

Substances that can transfer electricity well are called ... conductors.

• thermal

• electrical

• magnetic

• movement

Which substance below that is not a thermal conductor?

• copper

• iron

• cotton

• silver