Across
- 4. a group of people living in the same place or having particular characteristics in comon
- 8. Any resource, such as wood or solar energy, that can or will be replenished naturally in the course of time.
- 11. a state of balance in wich a populations size remains relatively stable over time, ocurring when birthrates plus immigration equals deth rates plus emigration.
- 12. a process by which pollution from such sources as sewage effluent or leachate from fertilized fields causes a lake, pond, or fen to become overrich in organic and mineral nutrients, so that algae and cyanobacteria grow rapidly and deplete the oxygen supply
- 13. The rising of cold, usually nutrient-rich waters from the ocean depths to the warmer, sunlit zone at the surface.
- 17. the precipitation of a substance from a solution.
- 19. the continous sequeence of events by wich atmospheric nitrogen and nitrogenous compounds in the soil are converted, as by nitrification and nitrogen fixation, into substances that can be utilized by green plants, the substances returning to the air and soil as a result of the decay of the plants and denitrification.
- 20. a person that buys merchadise, service
- 21. the study of the relationships between living organisms and their environment
- 22. geology. a continiuos process by which rocks are created, changed from one form to another, destroyed, and then formed again.
- 23. a taxonomic key is a diagnostic, often digital or printed tool used by biologist to identify unknown organisms by navigating a series of paired, contradictory statements.
Down
- 1. the ability to be sustained, supported, upheld, or comfirmed
- 2. a vertical succession of horizons, commonly lettered A, B, C (begining at the surface), that have been subjected to soil-forming processes, chiefly leaching and oxidation.
- 3. any resource, such as wood or solar energy, that can or will be replenished naturally in the course of time.
- 5. the change of a liquid into a vapor at a temperature below the boiling point. Evaporation takes place at the surface of a liquid, where molecules with the highest kenetic energy are able to escape. when this happens, the average kinetic energy of the liquid is lowered, and it's temperature decreases.
- 6. a company, person, or thing that creates, grows, manufactures, or supplies goods and services
- 7. the act of grovalizing, or extending to other or all perts of the world
- 9. harmful or poisonous substances introduced into an environment
- 10. a distinct volume of circulating fluid, in a fluid medium under gravity, that is heated from below and cooled from above: usually found in large groupings.
- 14. any process followed systematically to arrive at knoledge of the universe, expecialy in premodern times.
- 15. the natural sequence through which water passes into the atmosphere as water vapor, precipitates to earth in liquid or solidform, and ultimately returns to the atmosphere through evaporation.
- 16. energy derived from the sun in the form of solar radiation.
- 18. intensity or vitality of action or expression; forcefulness