Chapter 19 Ocean Water Quizs

Sea sponges are an example of

• plankton.

• benthos.

• phytoplankton.

• nekton.

As ocean water becomes colder, it also becomes

• saltier.

• denser.

• clearer.

• lighter.

A major obstacle to the advancement of aquaculture is

• high cost.

• pollution.

• political opposition.

• lack of usable ocean resources.

The ocean zone that receives the most solar energy and is home to the most diverse ocean life-forms is the

• continental shelf.

• benthic zone.

• pelagic zone.

• upwelling.

The two principal gases dissolved in ocean water are

• carbon dioxide and oxygen.

• oxygen and hydrogen.

• hydrogen and nitrogen.

• nitrogen and oxygen.

Some of the most deadly pollutants found in ocean water today include mercury, toxic chemicals such as DDT, and

• trace minerals.

• petroleum.

• decaying sea organisms.

• lead.

Although most wavelengths of visible light are absorbed at varying degrees by ocean water and microscopic sea life, the one color that is most reflected is

• red.

• green.

• violet.

• blue.

Most oxygen enters the ocean from

• underwater volcanoes.

• streams and rivers.

• the atmosphere.

• sea life.

Most offshore oil and petroleum deposits are found

• on the abyssal floor.

• on the continental shelf.

• along continental margins.

• under the ocean basin.

In the space provided, write the letter of the definition that best matches the term or phrase. reverse osmosis

• a process of removing salt from ocean water

• desalination process involving the forming of ice to produce fresh water

• process using filters and high pressure to extract fresh water from ocean water

• a potato-shaped lump of minerals found on the deep-ocean floor

• raising aquatic plants and animals for human use or consumption