Enviromental systems vocab

3. a substance that is toxic to plants, used to destroy unwanted vegetation.
4. an area or ridge of land that separates waters flowing to different rivers, basins, or seas.
8. community of plants and animals that have common characteristics for their environment
10. the variety of life in the world
11. the process by which fertile lands becomes desert
13. all the water's on the earth's surface
18. niche the role and position a species has in its environment
19. prevention of wasteful use of a resource
20. species a species that normally lives and thrives in a particular ecosystem
21. species an organism that causes ecological or economic harm
23. waste waste that has substantial or potential threats to public health or the environment
25. relating to or resulting from living things

1. diversity the number of different habitats that have one particular region can provide
2. a substance used for destroying insects or other organisms harmful to cultivated plants or to animals.
5. avoidance of the depletion of natural resources in order to maintain an ecological balance
6. a substance used for killing insects
7. a biological community of interacting organisms
9. a change or the process of change by which an organism becomes better suited to its environment
12. mutual dependence between things
14. the action of preserving something
15. key a tool that allows the user to determine the identity of items in the natural world
16. any large natural or artificial body of water used to store water
17. the long term average of weather, typically averaged over a period of 30 years
22. use the management and modification of natural environment or wilderness into built environment such as settlements and semi-natural habitats such as arable fields, pastures, and managed woods
24. physical rather than biological, not derived from living organisms