Ocean

1. A technique that uses sound waves to measure the depth of the ocean floor is

• dredging

• SCUBA

• SONAR

• weighted lines

2. Which of the following is an example of a connection between a terrestrial and aquatic food web?

• a polar bear eats a salmon

• a whale eats plankton

• a small fish eats plankton

• a mackerel eats a small fish

3. A deep canyon on the ocean floor is called a(n) _______.

• abyssal plain

• seamount

• ocean trench

• continental shelf

4. Non-living factors of an environment are called ______.

• abyssal factors

• abiotic factors

• biotic factors

• benthos factors

5. Benthos are organisms that live

• in the surface zone

• on the ocean floor

• throughout the water column

• in the neritic zone

6. Which of the following would be an example of nekton?

• starfish

• clam

• dolphin

• sea anemone

7. Coral reefs are located

• in cooler deep water zones at 50 degrees

• in shallow tropical water that is 68 degrees

• in lakes with temperatures at 68 degrees

• in intertidal zones at 78 degrees

8. A coastal inlet or bay where freshwater from a river mixes with salty ocean water is called __________. They are places where many marine organisms have babies and raise their young, like a nursery.

• a transition zone

• an estuary

• an abyssal plain

• a hydrothermal vent

9. When salt water mixes with freshwater from a river the water is considered to be _____.

• brackish

• salty

• fresh tasting and crisp

• fishy tasting

10. Which process allows cold ocean water, rich in nutrients, to rise to the surface?

• photosynthesis

• desalination

• undertow

• upwelling