Hydrosphere Review

This drawing represents an airplane ying over

the ocean, carrying equipment that measures

characteristics of the ocean. The equipment

produces two kinds of laser beams that react

di erently when they come into contact with the

ocean's surface and the ocean oor.

• water depth

• water temperature

• pH levels of water

• dissolved oxygen in water

Which best explains the importance of dissolved

gases in the ocean?

• They help control pollution.

• They help provide oxygen for aquatic animals.

• They help maintain a constant water

  temperature.

• They help maintain constant levels of salinity.

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The population density of marine life is greater

along the shorelines of the ocean than farther out

in the deep waters of the ocean. Which statement

provides the best reason for this situation?

• The shallow waters have fewer predators.

• Ocean currents prevent many smaller marine

  organisms from living in deep water.

• Coastal waters are less polluted than the

  deeper waters of the ocean.

• There are more nutrients in shallow waters

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What does the hardness of water indicate?

• high levels of calcium and magnesium

• low levels of calcium and magnesium

• increased pressure in pipelines to faucets

• decreased pressure in pipelines to faucets

Which describes a nonpoint source of pollution?

• accumulation of oil in a stream next to a

  gasoline station

• chemical spill in a river next to a

  manufacturing complex

• runoff from a road into a nearby stream

• liquid fertilizer flowing from a barrel into a

  stream

Where is the majority of Earth's freshwater

located?

• clouds

• polar ice caps

• rivers

• Pacific Ocean

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Which statement best explains the reason some

insects can walk across the surface of a lake?

• Water is a polar molecule, and its adhesiveness

  causes good capillary action.

• Water is a non-polar molecule, and its

  cohesiveness causes good capillary action.

• Water is a polar molecule, and its cohesiveness

  causes high surface tension.

• Water is a non-polar molecule, and its high

  adhesiveness provides high surface tension.

Which describes the hydrosphere?

• Most of it contains salt.

• It is made of only freshwater.

• All of it is located above ground

• It is formed by a climate change.

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Which interaction illustrates a terrestrial-aquatic

food web relationship?

• a bear eating fish in a river

• a turtle burying eggs in the sand

• a fish eating plankton in the ocean

• a bird laying eggs in a nest in a tree

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How can the atmosphere be considered part of the

hydrosphere?

• It is a source of water.

• It blocks ultraviolet rays from the sun.

• It contains the oxygen necessary for life on

  Earth.

• It traps pollutants that would otherwise harm

  the earth.

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