1.
A living thing.________________________
2.
An environment that provides the things a specific organism needs to live, grow, and reproduce.________________________
3.
A living or once-living part of an organism's habitat.________________________
4.
A nonliving part of an organism's habitat.________________________
5.
All the members of one species living in the same area.________________________
6.
All the different populations that live together in a certain area.________________________
7.
The community of organisms that live in a particular area, along with their nonliving environment.________________________
8.
An environmental factor that causes a population to decrease in size.________________________
9.
An organism that can make its own food.________________________
10.
An organism that obtains energy by feeding on other organisms.________________________
11.
An organism that gets energy by breaking down biotic wastes and dead organisms and returns raw materials to the soil and water.________________________
12.
A series of events in an ecosystem in which organisms transfer energy by eating and by being eaten.________________________
13.
The pattern of overlapping feeding relationships or food chains among the various organisms in an ecosystem.________________________
14.
A diagram that shows the amount of energy that moves from one feeding level to another in a food web.________________________
15.
How an organism makes its living and interacts with the biotic and abiotic factors in its habitat.________________________
16.
The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time.________________________
17.
An interaction in which one organism kills another for food or nutrients.________________________
18.
Any relationship in which two species live closely together and that benefits at least one of the species.________________________
19.
A type of symbiosis between two species in which one species benefits and the other species is neither helped nor harmed.________________________
20.
A type of symbiosis in which both species benefit from living together.________________________
21.
A type of symbiosis in which one organism lives with, on, or in a host and harms it.________________________
22.
The series of predictable changes that occur in a community over time.________________________
23.
The first species to populate an area during succession.________________________
