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Earth Sci. - Ecosystems

Across
The original source of almost all energy in the ecosystem.
Maximum number of organisms the ecosystem can keep alive.
The repeated movement of water from Earth's surface to the atmosphere and back.
The amount of energy that moves from one trophic level to the next.
A cow, because they only eat plants.
All the different species in an area.
Each step in the transfer of energy and matter within a food web.
A place where carbon is stored and out of the atmosphere.
A cool way for nitrogen to get into water so plants can use it.
A lion, because it only eats meat.
Must always be recycled in the ecosystem.
All the interconnected feeding relationships in an ecosystem.
A bear, because it will eat plants or animals.
Matter and energy can move in and out.
Things that make food for themselves and other things that eat them.
Down
Only energy can move in and out. Mater must stay in.
Flows in one direction and is never recycled.
At the beginning of many different food chains because they are producers.
The repeated movement of carbon into Earth's atmosphere and back to plants and animals.
An organism that cannot make its own food.
All the members of a particular species in a particular area.
These organisms must eat something in order to get their energy.
Organism that produces its own food.
All the places on Earth where things live.
The study of organisms and their interaction with each other and the environment.
Form of matter that all plants and animals need, but they cannot get it from the atmosphere.