Science

3. a source of which there is an endless supply because it can be replenished
7. a natural substance that is not replenished with the speed at which it is consumed
8. the complete disappearance of a species
11. consist of all the food chains in a single ecosystem
15. a species average population size in a particular habitat
18. living things within an ecosystem such as plants and animals
19. anything constrains a populations size and slows or stops it from growing
20. the process by which food is made by bacteria or other living things using chemicals as the energy source typically in the absence of sunlight

1. the process by which green plants and some other organisms use sunlight to synthesize food from carbon dioxide and water
2. the long term warming of the planet
4. an organism that eats plants and animals
5. any species that’s in danger of extinction
6. an organism such a earthworms or a fungus that feeds on dead and decomposing organic matter
9. describes the process in which carbon atoms travel from the atmosphere to the earth back to the atmosphere
10. the non living factors in an environment such as light or water
12. a group of organisms linked in order of the food the eat
13. an animal establishes a home in a habitat because it has resources it can utilize or because the habitat is ideal for them
14. the ability to do work
16. an introduced nonnative organism that has the potential to do harm to the environment
17. organisms of a species living together in a group at a particular place