The Hydrological Cycle

How is water stored in the atmosphere during the hydrological cycle?

• Only as minute droplets in clouds

• As water vapour or as minute droplets in clouds

• Only as water vapour

What is the store in the hydrological cycle where water is stored on the surface in rivers, lakes, and reservoirs?

• The land

• The atmosphere

• The sea

In which store is over 95% of the Earth's water estimated to be stored?

• Groundwater store

• Atmosphere

• The sea

What can cause variations in the proportion of water held in different stores in the hydrological cycle?

• Changes in ocean currents

• Changes in the Sun's energy

• Changes in atmospheric pressure

What form can water take in the land store during the hydrological cycle?

• Only as liquid

• Only as ice

• Mostly in liquid form, but also as snow and ice

Why is the hydrological cycle defined as a giant closed system?

• Because water primarily exists in the atmosphere store

• Because there is a fixed amount of water and it neither enters nor leaves the Earth and its atmosphere

• Because the stores are constantly changing

How is water converted from a liquid into a gas in the hydrological cycle?

• Through precipitation

• Through evaporation

• Through condensation

What process involves plants taking up liquid water from the soil and releasing it into the atmosphere as water vapor?

• Evaporation

• Condensation

• Transpiration

Which process involves the loss of moisture from the ground by direct evaporation from water bodies and soil, as well as transpiration from plants?

• Transpiration

• Percolation

• Evapotranspiration

What is the term for the change of water vapor in the atmosphere into liquid water droplets that form clouds?

• Evapotranspiration

• Precipitation

• Condensation