Unit 5 Quiz

Sunlight only penetrates the oceans surface to a depth of about 1000 meters. 100 meters. 10 meters. 1 meter.

100 meters.

The oceans contain what percent of the earth's water? 77 percent 87 percent 97 percent 98.7 percent

97 percent

The deepest part of the ocean is called the Marianas Trench. Pacific Trench. Aleutian Trench. MaryAnn Trench.

Marianas Trench.

__________ is the study of earth's oceans. Entomology Marineology Seaography Oceanography

Oceanography

Where is the deepest sea trench located? Atlantic Ocean Pacific Ocean Arctic Ocean Indian Ocean

Pacific Ocean

The largest of all earth's oceans is the Pacific Ocean. Arctic Ocean. Atlantic Ocean. Indian Ocean.

Pacific Ocean.

A technique that directs sound waves toward the ocean floor to map its depth is called a thermocline. oceanography. SONAR. temperature profile.

SONAR.

Periodic rise and fall of sea level is called a tide. an upwelling. a thermocline. sea level.

a tide.

Which of the following represents the flattest part of the earth's surface? mid-ocean ridges abyssal plains deep sea trenches continental margins

abyssal plains

Another name for a collapsing wave is a crest. breaker. trough. tide.

breaker.

The highest point of a wave is called the tide. trough. breaker. crest.

crest.

What would happen to the population of blue whales if pollution killed off the majority of plankton? no change increase decrease not enough information provided to tell

decrease

Scientists use SONAR mostly to predict storms. observe currents. check water temperature. determine ocean depth.

determine ocean depth.

Photosynthesis occurs in the benthic zone. true false

false

Algae—clam—sea star. This food chain would likely be found in the photic zone. in the intertidal zone. in the benthic zone. in the open ocean.

in the intertidal zone.

Seas are smaller than oceans and are landlocked. unexplored. always more salty. always less salty.

landlocked.

Ocean water that is near the surface is called a thermocline. cooler than bottom layer water. less dense than bottom layer water. more dense than bottom layer water.

less dense than bottom layer water.

What do the sediments of the abyssal plains mostly consist of? ooze sand and gravel mud seashells

mud

In terms of species variety, of these choices, oceans could be compared to deserts. grasslands. rainforests. rivers.

rainforests.

The measure of the amount of dissolved salts in seawater is called salinity. a density current. sea level. an upwelling.

salinity.

The level of the ocean's surface is called sea level. a thermocline. an upwelling. a tide.

sea level.

Ocean water contains different types of salt. The most common type of salt is magnesium chloride. calcium chloride. sulfur chloride. sodium chloride.

sodium chloride.

The __________ is a transitional layer of the ocean characterized by rapidly decreasing temperatures with depth. density current thermocline temperature profile surface current

thermocline

The lowest point of a wave is called the crest. trough. tide. breaker.

trough.