Understanding the Water Cycle

What percentage of the Earth's surface is covered in water?

• One third

• Over two thirds

• Half

• Three quarters

What is the process called when water turns into a gas due to the sun's heat?

• Condensation

• Precipitation

• Evaporation

• Run-off

Which of the following is NOT a form of precipitation?

• Rain

• Snow

• Hail

• Fog

What happens to water vapour when it cools down in the atmosphere?

• It evaporates

• It condenses

• It sublimates

• It solidifies

What is the term for water moving across land and into rivers and streams?

• Evaporation

• Condensation

• Run-off

• Precipitation

In the water cycle, where does water eventually return after moving through rivers and streams?

• The atmosphere

• The ocean or lakes

• Underground reservoirs

• Ice caps

How long has the water we use today been on Earth?

• Since the last century

• Since the last millennium

• As long as the Earth

• Since the last ice age

What is the continuous journey of water from oceans and lakes, to clouds, to rain, to streams, to rivers and back into the ocean called?

• The carbon cycle

• The nitrogen cycle

• The water cycle

• The oxygen cycle