| A | B |
| sunlight | the main source of energy for living things |
| the living factors in the environment | biotic |
| the non-living factors in the environment | abiotic |
| an organism that a parasite lives on or inside of | host |
| an organism that kills and eats another organism | predator |
| occurs when 2 or more species try to use the same resources | competition |
| a diagram that shows feeding relationships between organisms | food web |
| protective coloration an animal uses to blend into its environment | camouflage |
| water, air, rocks | examples of abiotic parts of the environment |
| humans, animals, plants | examples of biotic parts of the environment |
| colors that warn other organisms that prey is harmful | warning coloration |
| the study of the interaction of living things with each other and the environment | ecology |
| carnivore | an organism that eats meat |
| pollinator | an organism that carries pollen from one plant to another |
| community | all of the populations of living things in a certain area |
| herbivore | an organism that eats plants |
| scavenger | eats the remains of dead organisms |
| mutualism | a relationship between 2 species where both species benefit |
| decomposer | breaks down the remains of dead organisms and puts nutrients into the soil |
| energy pyramid | diagram that show's an ecosystem's loss of energy |
| omnivore | a living thing which eats both plants and animals |
| carrying capacity | is the largest population that an environment can support |
| limiting factor | a resource that is so scarce that it limits the size of a population |
| biosphere | any part of the earth where life exists |
| coevolution | occurs when a long-term change takes place in two species because of their close interaction with each other |