Salt Water Test Review

Which best explains how estuaries support plant and animal life?

• The dry land removes pollutants.

• The water provides energy for growth.

• The habitat areas provide nutrients and shelter.

• The cold temperatures decrease dissolved oxygen.

Which best explains where the richest deposits of oil and natrual gas can be located?

• Continental shelves

• Intertidal zone

• Deep zone

• Coral Reef

Most of the oxygen in Earth's atmosphere is produced in the top six inches of the oceans. Which best explains this?

• Oxygen is produced as a by-product as fish breathe through their gills.

• Oxygen is produced by seawater, which evaporates into pure oxygen and hydrogen.

• Oxygen is produced by deepwater plants and is then moved to the surface of the ocean.

• Oxygen is produced by photosynthetic microorganisms that live near the surface of the ocean.

Which technique uses sound waves to measure the depth of the ocean floor?

• Global positioning system

• Radar

• Sonar

• Surface

Which best describes the source of oxygen in the oxygen?

• Oxygen is produced by marine plants in the process of making food.

• Oxygen is produced through the exhalations of marine animals.

• Oxygen is produced through precipitation falling on the ocean.

• Oxygen is produced by nodules on the ocean floor.

Which characteristic distinguishes an estuary from other bodies of water?

• Plant life

• Animal life

• Salinity level

• Dissolved oxygen

Which causes cold ocean water to rise during an upwelling event?

• Motion of organisms

• Deep water currents

• Mass of nutrients

• Surface winds

Which contributes most in supporting life on the deep ocean floor?

• Cold water temperatures

• Extreme water pressure

• Hydrothermal vents

• Lack of predators

Which factors limit the productivity of a marine ecosystem?

• Availability of light and nutrients

• Availability of nutrients and freshwater

• Availability of light and chemosynthetic organisms

• Availability of photosynthetic organisms

Which part of the ocean do the greatest number of organisms live?

• In the deep zone to escape predators

• Near the shore to burrow

• Close to the surface to be near the largest food source

• In the ope ocean to regulate their bodies in cooler temperatures