Science unit 3: States and properties of matter

Which of these statements are true?

• All liquids have their own boiling point.

• Particles that condense have lots of energy.

• When water boils, it becomes a gas.

• The particles of a gas move slower than the particles of a liquid.

• Condensation is the opposite process to evaporation.

Name the two parts of a solution.

Substances that dissolve in water are ______________________.

Substances that do not dissolve in water are ______________________.

What happens when we heat water?

• the particles expand

• the particles move faster

• the particles expand and move faster

In the water cycle, which process makes clouds form?

• evaporation

• condensation

• freezing

2. When water in a kettle boils, steam is formed. What does steam contain?

• water as a gas

• water as a liquid

• water as a liquid and a gas

What is the process called when water vapor turns into liquid water?

• evaporation

• condensation

• freezing

How can we separate salt from water?

• by evaporation

• by filtering

• by cooling

What is the main source of energy for the water cycle?

• water

• plants

• the Sun