Groundwater and Oceans Unit 1- 8.E.1.1

Which best describes the amount of Earth’s total water supply that is usable freshwater?

• less than 1%

• less than 25%

• greater than 50%

• greater than 75%

Which best describes the process of evapotranspiration in the water cycle?

• Water from the ocean enters the atmosphere as water vapor.

• Water on the surface of Earth enters the groundwater supply.

• Water vapor in the atmosphere returns to the surface of Earth as liquid water.

• Water on the surface of Earth and water lost by plants enters the atmosphere as water vapor.

During a drought, the water table dries while the aquifer remains nearly full. Which best explains this?

• During the drought, the water table increases, but the water level in the confined aquifer increases.

• During the drought, the water table falls, but the confined aquifer is mostly isolated from the drought conditions and remains unaffected.

• During the drought, the water table remains constant, but the

  confined aquifer keeps its water level because of other sources of water.

A local farm experiences significant drought over a 2-year period. A

temporary solution for the lack of water is to dig another well closer to the fields to water crops. Two years before, in a similar situation, the

water table was reached at 15 feet below the ground. Which is necessary for the well to supply water to the crops?

• The well needs to be dug to 13.5 feet.

• It is not necessary to find the water table when digging a well.

• The well should be dug to more than 15 feet to find the water table.

Which best describes the amount of frozen water on Earth?

• About 2% of Earth’s water is frozen.

• About 3% of Earth’s water is frozen.

• Exactly 0.9% of Earth’s water is frozen.

Where is most of the fresh surface water located on Earth?

• Ice caps

• Lakes

• Oceans

Sea otters consume sea urchins, which in turn thrive in kelp forests off the coast of California. These underwater forests depend on cold water. Which would yield the most stable ecosystem for sea otters?

• underwater volcanoes

• hurricane activity

• upwelling

What land use would be the best choice for watershed drainage?

• mall

• wetland

• recreational area

Where does most fresh water exist?

• ice caps, lakes, and streams

• glaciers, rivers, and oceans

• aquifers, ice caps, and glaciers

Which percentage represents the amount of Earth’s water that is found in oceans?

•  3%

• 71%

• 97%