Ecosystem - A community plus the abiotic (nonliving) factors in the environment.
Producers - Use photosynthesis (sunlight + inorganic nutrients) to make their own food.
Consumers - Eat other living things.
Primary consumers - Are herbivores, they eat producers.
Secondary consumers - Are carnivores,they eat primary consumers.
Tertiary consumers - The top predators, Eat anything they desire.
Omnivores - Eat both plant and animal material.
Decomposers - Break down detritus
Detritus - dead organic matter
Energy flow through an ecosystem - Energy flows one-way through the ecosystem it does not cycle.
Food chain - GRASS -> MOUSE -> SNAKE -> HAWK - Shows how energy and matter (carbon etc.) move from one organism to the next.
Trophic Level - All organisms that eat the same thing (similar feeding level)
Food web - Shows all feeding connections and it is usually very complex.
Primary Productivity - the amount of solar energy trapped by plants and converted to plant matter.
Biogeochemical cycles - Cycles of matter from being held in living things to being free in the environment.
Carbon cycle - Carbon has to be "fixed" by plants so everyone else can use it.
Hydrologic cycle - Cycle from the clouds to the ocean/land and back to the clouds.
Evaporation - Water has to evaporate from the oceans and fresh water to make water vapor in the clouds.
Nitrogen Cycle - Nitrogen has to be "fixed" by bacteria so plants can use it and give it to us.