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What provides the energy to power the water cycle?

• gravity

• wind

• air pressure

• sun

What is an underground water supply?

• permafrost

• glacier

• aquifer

• saltwater

A city has limited access to freshwater resources, so the city builds a reservoir. How does this structure help solve the problem of limited freshwater?

• It cleans polluted water.

• It collects and stores water.

• It accesses aquifers underground.

• It promotes evaporation for the water cycle.

Why is the ocean important to the water cycle?

• the ocean currents

• the ocean layers

• the ocean makes up most of the earth's water

• Louisiana's water

Which two features most greatly influence the temperature of the ocean?

• amount of salt in water

• depth of water

• distance of water from the equator

• amount of oxygen in water

A scientist took samples of different water sources from an area. She recorded her data in a table with labels of how salty the water is in each location. The higher the number for salinity, the more salt there is in the water. Where would you expect to find the delta sample with 40,000 ppm?

• in a river

• in an ocean

• in an aquifer

• in a wetland

A scientist took samples of different water sources from an area. She recorded her data in a table with labels of how salty the water is in each location. The higher the number for salinity, the more salt there is in the water. Where would you expect to find the gamma sample with 700 ppm?

• in a river

• in the ocean

• in an aquifer

• in a wetland near the ocean

What is evidence that condensation has occurred?

• Steam rises from a pot of boiling water.

• Rain falls from a cloud onto the ground.

• Drops form on the outside of a glass of water.

• A puddle begins to dry up on a hot day.