environmental system

3. the weather conditions prevailing in an area in general or over a long period
5. a susbstance for destroying insects or other organism harmful to cultivated plants or to animals
8. non-native species that spreads from the point of introduction and becomes abundant
11. carbon is exchanged among the biosphere, pedosphere, geosphere hydrosphere and atmosphere of the Earth
12. a tool that allows the user to determine the identity of items in a natural world
14. laying down of sediment carried by wind, water, or ice
15. community of plants and animals that have common characteristics for the environment they exist in
17. the draining away of water from the surface of an area
19. a change or the process of change by which an organism or species becomes better suited to its environment
20. the variety of life in the world or in a particular habitat or ecosystem
21. practical philosophy that aims to reduce personal and societal environment impact by making positive changed which counteract climate change and other negative environment concerns
23. breakdown of rocks at the Earths surface, by the action of rainwater, extremes of temperature, and biological activity
24. combined mass of water found on, under, and above the surface of a planet, minor planet or natural satellite

1. the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
2. any substance that has mass and takes up space by having volume
4. biological community of interacting organisms and their physical environment
6. the process of eroding or being eroded by wind, water, or other natural agents
7. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous affects
9. avoidance of the depletion of natural resources in order to maintain an ecological balance
10. living organism that shapes an ecosystem
11. prevention of wasteful use of a resource
13. a system of interlocking and interdependant food chains
16. management and modification of natural environment or wilderness into built environment such as settlements and semi-natural habitats
18. a species that has been observed in the form of a naturally occurring and self-sustaining population
22. non-living physical and chemical composition of nature