evaporation, runoff, ice formation, melting of ice
100
Marine organisms are classified according to where they live and how they?
move
100
the use of light energy to convert water and carbon dioxide into energy-rich glucose molecules
photosynthesis
100
Feeding relationships in which organisms feed on a variety of organisms
What is food chain
100
Where does most ocean pollution come from?
land activities
200
Is the following sentence true or false? The average salinity of seawater is 35 percent.
false
200
Is the following sentence true or false? A hydrothermal vent is a crack in Earth’s crust where seawater seeps in and becomes superheated by Earth’s internal energy.
False
200
the production of organic compounds from inorganic substances through photosynthesis or chemosynthesis
chemosynthesis
200
The saltiness or dissolved salt content of a body of water
What is salinity
200
Elevated water temperatures can cause coral to do what
bleach
300
Most of the salt in seawater is ___________  , or common table salt.
sodium chloride
300
Three factors used to divide the ocean into distinct marine life zones are?
Light penetration, Temperature and Depth
300
the process by which certain microorganisms create organic molecules from inorganic nutrients, using chemical energy
primary productivity
300
a steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures.
What is thermocline
300
Ocean acidification is putting which animals most directly at risk?
Shelled animals
400
What are two main factors that influence density of seawater.
salinity and temperature
400
What organism directly or indirectly provides food for the majority of organisms?
Algae
400
Is the following sentence true or false? Productivity in tropical regions is unlimited because of the abundance of nutrients.
true
400
a layer in an ocean or other body of water in which water density increases rapidly with depth.
What is pycnocline
400
What area of the ocean is suffering the most from habitat destruction?
the coasts
500
our ways in which fresh water is naturally added to seawater are decreasing its salinity is? pr
Precipitation, runoff from land, icebergs melting, and sea ice melting.
500
What is like an adult sea star?
nekton
500
Two factors that influence a region’s photosynthetic productivity are the availability of nutrients and the amount of?
the amount of solar radiation and the availability of nutrients
500
Organisms that drift with ocean currents
What is nekton
500
World ocean temperatures set a record in 2009. What was the average water temperature worldwide in july?