Ocean Zones and Phytoplankton

1.

Multiple Choice

15 mins

1 pt

Decreasing ocean temperature causes the density of the water to ______.

decrease

increase

stay the same

fluctuate

2.

Multiple Choice

15 mins

1 pt

Nutrients are brought to the surface for phytoplankton to use at _______.

gyres

eddies

upwellings

the equator

3.

Multiple Choice

15 mins

1 pt

________ and _______ affect the ocean's density and cause the Global Conveyor Belt to travel

gravity and the Coriolis Effect

temperature and salinity

wind and climate

temperature and the Coriolis Effect

4.

Multiple Choice

15 mins

1 pt

Carbon dioxide and seawater combine to form

calcium carbonate

carbon monoxide

carbonic acid

5.

Multiple Choice

15 mins

1 pt

Ocean acidification begins with

pollution from ships

carbon dioxide released from combustion

dumping of waste from cities into the ocean

6.

Multiple Choice

15 mins

1 pt

An increase in the amount of nutrients in a lake is known as

plankton

oligotrophic

eutrophication

7.

Multiple Choice

15 mins

1 pt

In what zone does approximately 90% of all ocean life live?

photic (=euphotic)

aphotic

8.

Multiple Choice

15 mins

1 pt

Light does not reach the bottom of the ocean, yet certain species live there. Which best explains how species on the bottom of the ocean get energy to live?

Algae and bacteria produce energy through photosynthesis.

Hydrothermal vents produce energy through chemical reactions.

Dead plants and animals produce energy through decomposition.

Light comes from the core of the earth.

9.

Multiple Choice

15 mins

1 pt

Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source?

chemosynthesis

electrical charge

hydropower

thermal heat

10.

Multiple Choice

15 mins

1 pt

Animal members of the plankton community.

Phytoplankton

Meroplankton

Holoplankton

Zooplankton

11.

Multiple Choice

15 mins

1 pt

Scientists use ______ to determine the oceans depth.

Submarine

Sonar

Helicopter

Light

12.

Multiple Choice

15 mins

1 pt

The ocean is salty mainly due to the weathering & erosion that takes place on igneous rocks found in Earth’s crust and on the mountains. It is also salty due to the dead ocean animals whose bodies sink to the ocean floor.

True

False

13.

Multiple Choice

15 mins

1 pt

You like to breathe? More than half of Earth's oxygen is created by ______________in the ocean, but their levels are declining because oceans are warming up.... 😠

phytoplankton

zooplankton

chemosynthesis, hydrothermal vents

agricultural plants

14.

Multiple Choice

15 mins

1 pt

Another reason algae /phytoplankton are important is because these serve as _____________ to most food chains in the ocean

salinity protection

primary food source

barriers from strong currents/weather systems

15.

Multiple Choice

15 mins

1 pt

Which ocean floor feature is the steep cliff-like drop beyond the continental shelf?

Continental Shelf

Continental Slope

Abyssal Plain

Ocean Trench

16.

Multiple Choice

15 mins

1 pt

What is chemosynthesis?

Where bacteria use light energy to make glucose.

Where plants use light energy to make glucose

Where bacteria use chemical reactions to make glucose

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