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20 Cards in this Set

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  • Back
What is the process by which green plants and other producers use light energy to make food?
photosynthesis
Why is visibility decreased the deeper you go in the ocean?
the surface water absorbs much of the sunlight
How do temperature and pressure change as you go deeper into the ocean?
Temperature decreases, pressure increases
What unit is water pressure measured in?
pounds per square inch
What do all food chains in the ocean start with?
phytoplankton
What are 3 examples of nekton?
fish, squid, octopus, whale, porpoise
What 2 factors affect the density of ocean water?
temperature and salinity
What are 3 examples of benthos?
clams, starfish, oysters, mussels, crabs, seaweed, coral, barnacles
What are tiny living creatures that float near the surface and drift with the currents?
plankton
What are the 6 main substances that make up about 99% of all the dissolved materials in ocean water?
sodium chloride, magnesium sulfate, magnesium chloride, calcium chloride, potassium chloride, sodium bicarbonate
What are all of the free-swimming animals that live in the ocean?
nekton
What are the plants and animals that live on the ocean floor?
benthos
What is the total amount of dissolved salts on ocean water?
salinity
What are substances that wash into the ocean but do not dissolve?
sediments
What is ocean water?
A mixture of the compound water(H20) and several salts.
What are animal-like plankton?
zooplankton
Where did the salt in the present day oceans come from?
When rainwater flows over the land, it dissolves and carries away traces of salt. The rainwater drains into rivers and streams and empties into the oceans.
What are plantlike plankton?
phytoplankton
What causes the condition called the bends in SCUBA divers?
nitrogen builds up in their body tissues, which forms bubbles in their blood
What does SCUBA stand for?
Self-Contained Underwater Breathing Apparatus