4.7 Oceans

Salinity is the —

• measure of all salts dissolved in water

• thick layers of sediment on the ocean floor

• mixing of waters at various temperatures

• runoff of sand, mud, and rocks into the ocean

Which ocean feature is found at the greatest depth?

• Continental slope

• An ocean trench

• Abyssal plain

• Continental shelf

Tags

NGSS.MS-ESS2-3

Which explains how ocean currents are formed?

• Earthquakes shaking the ocean and erupting ocean volcanoes

• Typhoons and hurricanes that begin over open water

• Marine plant and animal population increases

• Wind patterns and temperature differences in the water

Tags

NGSS.MS-ESS2-6

What is the main cause of tides?

• Runoff from nearby land

• Melting icebergs and evaporation rates

• Difference in temperature of ocean water

• Moon’s gravitational pull

Tags

NGSS.MS-PS2-4

Which part of the ocean floor is usually the flattest?

• Continental slope

• Continental rise

• Ocean trench

• Abyssal plain

Which organisms serve as producers within an ocean food web? Choose 2 correct answers.

• phytoplankton

• Whales

• Algae

• Invertebrates

Tags

NGSS.MS-LS2-3

What is true as you increase in depth in the ocean?

• The variety of organisms increases

• The amount of sunlight increases

• The temperature increases

• The pressure increases

Use the terms to label each feature of the ocean floor.

c

b

d

a

e

continental slope

continental shelf

trench

continental rise

abyssal plain

Tags

NGSS.MS-ESS2-3

What would happen to the organisms in this food web if all the phytoplankton, algae, and kelp died?

• They would all die because they are the start of the food web.

• The sea otters would eat more sea urchin.

• The sharks would eat more large fish.

• The crabs would die.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is the part of the ocean where most life is found?

• ocean trench

• continental shelf

• abyssal plain

• ocean current

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4