Ocean Floor
What is the zone that makes up the ocean floor?
Benthic zone
Which ocean zone has the most light?
How does pressure change as you go deeper in the ocean?
It increases
What is the area between the high tide line and the low tide line?
Intertidal or littoral zone
Why do animals eat each other?
For energy for everyday processes
What is the name of the community that lives on the ocean floor?
The Benthos
Which ocean zone is the deepest?
Is salt water more dense or less dense than fresh water?
More dense
What word means open water far from the coast?
Pelagic
What are the three categories that ocean organisms can be sorted into?
Phytoplankton, Zooplankton, Nekton
What is the word for pitch black darkness?
Aphotic zone
Which zone has the primary food production?
Epipelagic zone
How much energy is passed up from one trophic level to the next?
About 10%
What are organisms that actively propel themselves through the water?
Nekton
What are the two types of plankton?
Zooplankton and phytoplankton
What are cracks in the ocean floor that spew superheated water and nutrients?
Hydrothermal vents
Which zone has some light but not enough to support photosynthesis?
Mesopelagic zone
How are food chains different from food webs?
Food chains are just one example of how animals eat each other (linear), and a food web shows many different feeding interrelationships together
What producer makes most of the oxygen in the ocean?
Phytoplankton
Describe a basic ocean food chain.
Primary Producer, Primary Consumer, Secondary Consumer, Tertiary Consumer
What is the difference between the neritic zone and the oceanic zone?
Neritic zone is the water area above the continental shelf; the oceanic zone is the surface waters beyond the continental shelf
Name the 5 ocean zones from the ocean surface to the bottom of the ocean floor.
Epipelagic, Mesopelagic, Bathypelagic, Abyssopelagic, Hadalplelagic
What are dinoflagellates?
Phytoplankton that blooms & produces toxins that can kill fish and other marine life
Which zone is derived from the Greek word "bottomless"?
Abyssopelagic or abyssal zone
Why do food chains have to start with a producer?