Across
- 2. The circumstances or conditions that surround an organism or group of organisms as well as the complex of social or cultural conditions that affect an individual or community.
- 3. Potential energy stored in chemical bonds of molecules.
- 8. The biological degradation of organic material under aerobic (oxygen-rich) conditions to produce compost, a nutrient-rich soil amendment and conditioner.
- 11. Any discarded material containing substances known to be toxic, mutagenic, carcinogenic, or teratogenic to humans or other life-forms; ignitable, corrosive, explosive, or highly reactive alone or with other materials.
- 13. Water other than seawater; covers only about 2 percent of earth's surface, including streams, rivers, lakes, ponds, and water associated with several kinds of wetlands.
- 14. Deoxyribonucleic acid; the long, double-helix molecule in the nucleus of cells that contains the genetic code and directs the development and functioning of all cells.
Down
- 1. Chemicals (some natural, too) that react in our body similarly to how our own hormones react
- 3. In any chemical reaction, matter changes form; it is neither created nor destroyed.
- 4. A chemical that kills plants.
- 5. The genetic, species, and ecological diversity of the organisms in a given area.
- 6. Water held in gravel deposits or porous rock below the earth's surface; does not include water or crystallization held by chemical bonds in rocks or moisture in upper soil layers.
- 7. The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons, neutrons, and electrons.
- 9. Petroleum, natural gas, and coal created by geological forces from organic wastes and dead bodies of formerly living biological organisms.
- 10. A description of the long-term pattern of weather in a particular area.
- 12. The capacity to do work (that is, to change the physical state or motion of an object).