P.1 Water cycle/density

Which of the following are types of freshwater that can be used by people?

Select all that are true.

• groundwater

• ice caps and glaciers

• oceans

• rivers

• lakes

What is the energy source for the water cycle?

• sun

• wind

• rain

• oceans

What are clouds made of?

• air

• water

Which statement correctly describes how clouds are formed?

• Clouds form when a large block of ice is frozen in the sky.

• Clouds form when a solid changes directly to a gas through sublimation.

• Clouds form when water turns into a gas

• Clouds form when heated water vapor is cooled

When water vapor is cooled and forms droplets-

• Condensation
• Evaportation
• Transpiration
• Run-off

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

What is precipitation?

• The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
• The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
• The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.

On which kind of day would you expect the most evaporation from the surface of a pond?

• cold, rainy
• cold, sunny
• warm, rainy
• warm, sunny

What is water vapor?

• Water on the land (geosphere)
• Water in the air (atmosphere)
• Water in plants
• Water in the water (hydrosphere)

What is the role of the sun in the water cycle?

• provide heat energy for evaporation

• provide heat energy for condensation

• dry out the soil for runoff to occur

• provide thermal energy for accumulation