Marine Ecosystem

In which oceanic zone do clams and crabs survive by burrowing in the sand?

• oceanic

• deep sea

• open sea

• intertidal

What lives on or near the bottom of the ocean?

• Plankton

• Nekton

• Benthos

• Hydrothermal Vents

What is microscopic and floats in the ocean?

• Plankton

• Benthos

• Nekton

• Fish

Many organisms that live in the rocky intertidal zone are able to burrow into the sand or have shells than can close tightly because they need to withstand the ...

• pounding of the waves

• changes in salinity

• periods of being underwater and exposed to air

• changes in density

Tags

NGSS.MS-LS2-3

The part of the ocean where ecosystems do not rely on sunlight to create nutrients, but instead rely on chemicals released from inside the Earth to sustain life ...

• the intertidal zone

• around hydrothermal vents

• the deep zone

• the surface zone

The part of the ocean that extends from the edge of one continental shelf to the other is called the...

• neritic zone

• open-ocean zone

• intertidal

• deep zone

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?

• Ocean currents prevent many smaller marine organisms from living in deep water.

• The shallow waters have fewer predators.

• Coastal waters are less polluted than the deeper waters of the ocean.

• There are more nutrients in shallow waters.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Water is brought to an estuary from a variety of sources. Which of the following is responsible for increasing the salinity in the estuary?

• Rivers

• Streams

• Urban Run-Off

• Tides

Tags

NGSS.MS-LS2-4

Water in most estuaries is brackish because of the mixing of fresh water from rivers and saltwater from incoming tides. A drought in the bay watershed would most likely cause the water in the bay to …

• increase in salinity.

• decrease the salinity

• Stay the same

• Rise

Tags

NGSS.MS-ESS2-4

What % of water covers the Earth, is in the ocean and is in freshwater?

• There is 97% of water that covers the Earth because it takes up most of the Earth. There is 71% that is in our oceans, 3% that is in freshwater and only 1% of that freshwater that we can use.

• There is 71% of water that covers the Earth because it takes up most of the Earth. There is 97% that is in our oceans, 3% that is in freshwater and only 2% of that freshwater that we can use.

• There is 71% of water that covers the Earth because it takes up most of the Earth. There is 97% that is in our oceans, 3% that is in freshwater and only 1% of that freshwater that we can use.

• There is 71% of water that covers the Earth because it takes up most of the Earth. There is 97% that is in our oceans, 3% that is in freshwater and only .05% of that freshwater that we can use.

Tags

NGSS.MS-ESS2-4