Biology

1. limiting factor that affects all populations in similar ways, regardless of the population density
8. A species that isn't from that environment and comes in and takes over
10. the first producers of energy-rich compounds that can be used later by other organisms
11. all the organisms that live in a place, together with their physical environment, are known as an ecosystem.
12. must acquire energy from other organisms, usually by eating them
13. keeps the heat in and wont let it out like a blanket
14. a large naturally occurring community of flora and fauna occupying a major habitat
15. consists of short-term changes in temperature, precipitation, clouds, and wind from day to day, or minute to minute.
16. an assemblage of different populations in an area
17. chemical energy powers production of carbohydrates
19. movement of individuals into an area occupied by an existing population
20. a biotic factor is any living part of the environment with which an organism might interact.

2. an abiotic factor is any nonliving part of the environment, such as sunlight, heat, precipitation, humidity, wind or water currents, and soil type.
3. describes the way individuals are spaced out across their range
4. defined by patterns and averages over many years of temperature, precipitation, clouds, wind, and extreme weather events such as heat waves, droughts, and floods.
5. the number of individuals of a species that an environment can support
6. limiting factors that operate more strongly when population density is high
7. the sphere that contains all life
9. movement of individuals out of an area
18. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings