The Water Cycle Answers

How much of the Earth’s water is usable as a freshwater resource?a.75%b.3%c.100%d.25%

Nearly 50% of water sources in the United States are believed to be polluted.

The water on the Earth today has been sustaining life for millions of years.

What happens to water in the atmosphere as it rises?a.It evaporates.b.It condenses and forms clouds.c.It combines with other gases in the air.d.It is used up.

How does water enter the atmosphere? a. Liquid water evaporates from lakes when heated by the sun. b. Frozen water sublimates from ice and snow. c. Liquid water is lost from tree leaves during evapotranspiration. d. All of the above. Please select the best answer from the choices provided

Which of the following contributes to nonpoint source pollution in water?a.automobilesb.oil refineriesc.paper millsd.water treatment plants

Why is nonpoint source pollution potentially more harmful than point source pollution?a.Nonpoint source pollution disrupts the water cycle.b.Nonpoint source pollution is difficult to regulate.c.Nonpoint source pollution comes from more than one source.d.Nonpoint source pollution is more damaging to living organisms than point source pollution.

Where is water stored?a.cloudsb.the groundc.animalsd.all of the above

How does capillarity help sustain life?a.Plants use capillarity to move water from their roots to their leaves.b.Capillarity allows water to form droplets.c.Animals rely on capillarity to maintain their body temperatures.d.Water’s capillarity allows many different substances to dissolve in water.

Aquifers are _______.a.structures used to transport water from city to cityb.created through evapotranspirationc.densely packed snow close to becoming glaciersd.layers of porous rock or sand