As the temperature of the ocean increases, which most likely occurs?

the level of dissolved oxygen decreases

the rate of photosynthesis increases

the amount of minerals decreases

the level of dissolved nitrogen increases

Why is sonar used for mapping the seafloor?

. it determines the depth of the ocean floor

it tells the speed of ocean currents

it tells scientists the amount of sunlight per ocean zone

. it tells scientist the temperature ocean water

Which best explains why estuaries are productive ecosystems?

They receive nutrients from both rivers and the ocean.

They have high saltwater content

They have high levels of dissolved gases.

They receive chemicals from commercial and industrial runoff.

Which best describes the process of desalination?

B. the process of removing salt from ocean water

A. the process of adding chlorine to drinking water

C. the mixing of saltwater and freshwater

D. cold-nutrient rich water rising from deep ocean to the ocean’s surface.

Bluefin tuna has become the most popular fish for sushi in Japan. Which is most likely the impact this has had on the species?

Bluefin numbers are increasing.

All Bluefin are now raised on farms

There has been no impact on the species.

What does the U.S. Marine Protection, Research, and Sanctuaries Act do?

It prohibits dumping harmful materials into the ocean

It prohibits accidental oil spills.

It puts lifeguards at every U.S. beach.

It puts Congress in charge of trash dumping.

Why is plastic trash dangerous to marine animals?

Animals can mistake it for food and choke on it.

Animals are not affected by plastic trash

Plastic trash breaks down too quickly.

Plastic trash is oily and sludgy.

Exploring Earth's oceans

Authored by Tabitha Horton

Other Sciences

8th Grade

Used 113+ times

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19 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is the base of the ocean food web?

A. seal

B. fish

C. plankton

D. shrimp

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How are estuaries connected to oceanic organisms?

A. Estuaries provide sunlight for oceanic organisms.

B. Estuaries provide primary food for oceanic organisms.

C. Estuaries provide excess dissolved oxygen for oceanic organisms.

D. . Estuaries provide a nursery grounds for oceanic organisms.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which will most likely result if there is increased upwelling in a coastal area?

A. more aquatic life in the area

B. more turbidity

C. fewer nitrates

D. higher water temperatures

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which best explains why the water cycle mostly occurs over the oceans?

Salt water evaporates more quickly than freshwater

The temperatures over the oceans are warmer than over land.

Most of Earth’s water is located in the oceans.

The temperatures over the oceans are cooler than over land

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How would excessive increases in nitrate and phosphorous concentration affect freshwater systems?

It would cause excessive algal blooms

.It would cause increased dissolved oxygen.

. It would cause increased water clarity.

It would cause extremely cold water.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which explains why there are fewer marine organisms in the deeper zones of the ocean?

amount of light decreases

pollution increases

salinity increases

ph increases

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which best describes organisms that live in the intertidal zone?

they can all swim

they are all fish

. they can survive in both freshwater and saltwater

They can survive in both air and water

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Exploring Earth's oceans

Which of the following is the base of the ocean food web?

How are estuaries connected to oceanic organisms?

Which will most likely result if there is increased upwelling in a coastal area?

Which best explains why the water cycle mostly occurs over the oceans?

How would excessive increases in nitrate and phosphorous concentration affect freshwater systems?

Which explains why there are fewer marine organisms in the deeper zones of the ocean?

Which best describes organisms that live in the intertidal zone?

To which condition do all species in the ocean depths have to adapt?

As the temperature of the ocean increases, which most likely occurs?

Why is sonar used for mapping the seafloor?

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