Across
- 7. Only births and deaths are possible in a _____ population.
- 8. Soil ________ is determined from the average size of pores.
- 9. The variety of life on earth.
- 10. An area of land that intercepts and grains precipitation through a particular river system or group of river systems.
- 11. Carbon rich organics like dried leaves and grass.
- 13. Breaks down dead animals and releases nutrients in the ecosystem.
- 16. The term that refers to a specific level in the food chain.
- 18. The gas produced by the rotting of organic materials in a landfill.
- 19. Another name for a producer; an organism which produces it's own food.
- 22. A technique to conserve soil that changes the crops grown in a plot eat year, replenishing the soil's nutrients is called a crop _______.
- 23. The first stage of waste-water treatment to remove soilic garbage from water is through a ________.
Down
- 1. The word for electronic waste.
- 2. The final thing added to waste-water to further disinfect water.
- 3. A surface where it's harder for the precipitation to sink in is called a(n) ________ surface.
- 4. What happens to most of the rain water that falls in a natural area.
- 5. The act of reasoning from factual knowledge or evidence.
- 6. The total amount of chemical administered or taken by an organism.
- 12. The land in which crops can be grown.
- 14. All members of all species living in an ecosystem.
- 15. The method where animals are trapped, marked, and then released to determine the estimated population is called: mark-return ______
- 17. The relationship between a set of factors (causes) and a phenomenon (effect).
- 20. The layers that soil develop into.
- 21. Nitrogen rich organics like kitchen scraps and tree grass clippings.