Hmh Science Unit 4 Benchmark

During which stage do clouds form?

• condensation
• evaporation
• precipitation

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

• condensation
• evaporation
• sublimation
• transpiration

Why is MOST of the freshwater on Earth not available for our use?

• All freshwater on Earth is easily accessible for use.
• It is frozen in the icecaps and glaciers.
• It is surface water.
• It is underground.

What change is occurring at stage 1 of the diagram above?

• Water is changing from gas to Solid.
• Water is changing from liquid to gas.
• Water is changing from gas to liquid.
• Water is changing from liquid to solid.

What step in the water cycle is illustrated at number 4 on the diagram above?

• evaporation
• transpiration
• Condensation
• Surface run-off

Which represents the distribution of water on Earth?

• 3% freshwater, 97% salt water
• 97% freshwater, 3% salt water
• 71% freshwater, 29% salt water
• 29% freshwater, 71% salt water

What is the source of energy for all parts of the water cycle?

• Soil
• Wind
• the Sun
• the Ocean

As time goes by and water goes through the water cycle again and again, the amount of Water On Earth

• increases
• decreases
• stays the same
• goes up and down

In the water cycle; rain, snow, hail, or sleet falling to the ground are a form of 

• precipitation
• evaporation
• transpiration
• Condensation

Which of these is an example of precipitation?

• snow
• air
• clouds
• vapor