1. Ecosystems

2. Biotic factors
Biotic factors
these are things that are living

3. Abiotic factors
Abiotic factors
these are things that are non-living

4. Organism population community ecosystem

5. Relationships in ecosystems
Symbiosis-any close relationship between two species
Mutualism-both species benefit from the relationship
ex. Bees & flowering plants
Commensalism-one species benefits and the other is neither helped or harmed
ex. Clown fish & sea anemone
Parasitism-one species benefits and the other is harmed or possibly killed
host-term given to the organism that is harmed
parasite-term given to the organism that benefits
ex. Tapeworms & humans

6. Transfer of Energy in ecosystems
Food chains & food webs are made up of the producers, consumers, decomposers and scavengers
Producers are those organisms that can make their own food
Consumers cannot make their own food
there are 3 different kinds
herbivore-eats only plants
omnivore-eats plants and animals
carnivore-eats only animals
Decomposers break down waste and other dead materials
Scavengers eat things that are dead

7. A food chain is how energy is transferred in a community
A food chain is how energy is transferred in a community. Here we have grass being eaten by a grasshopper, a bird eating the grasshopper and a snake eating the bird. A food web is simply many overlapping food chains.
A food chain is how energy is transferred in a community. Here we have grass being eaten by a grasshopper, a bird eating the grasshopper and a snake eating the bird.