Earth Science Chapter 22 Ocean Environments

TRUE or FALSE
The amount of salt is the same everywhere in the ocean.

• TRUE
• FALSE

What causes deep ocean currents?

• differences in salinity and temperature
• wind

What causes surface currents?

• differences in salinty and temperature
• wind

We get most of our oxygen from ___________________. 

• phytoplankton
• zooplankton

What decreases as the depth increases?

• pressure
• temperature and light(visibility)

Where would most ocean animals be found?

• sunlit zone
• twilight zone

As oceans become deeper, the water pressure ___________________.

• increases
• decreases
• stays the same

Which of these organisms would be LOWEST on the ocean food chain?

• Shark

• Dolphin

• Big Fish

• Zooplankton

Which of the following is true of the ocean floor?

• It is totally flat.

• It has the same depth everywhere

• It has many of the same geological features you find on land.

• It is covered in sea grass.

TIny, plant-like organisms that live in the ocean and create much of the world's oxygen are called:

• Zooplankton

• Fish

• Phytoplankton, or algae

• Seaweed