Across
- 5. rain, snow, sleet, or hail that falls to the ground
- 9. avoidance of the depletion of natural resources in order to maintain an ecological balance
- 10. the ability to do work or cause change
- 11. organisms that make their own food
- 14. organisms which feed on dead remains of plants and animals
- 15. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
Down
- 1. the process by which businesses or other organizations develop international influence or start operating on an international scale
- 2. the process of turning from liquid into vapor
- 3. the processes through which the three main rock types (igneous, metamorphic, and sedimentary) transform from one type into another
- 4. a person or thing that eats or uses something
- 6. a resource of which there is an endless supply because it can be replenished
- 7. the process in which a water body becomes overly enriched with nutrients, leading to the plentiful growth of simple plant life
- 8. the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
- 12. radiation from the sun capable of producing heat, causing chemical reactions, or generating electricity
- 13. the introduction of harmful materials into the environment