Chapters 5 and 6 vocabulary

1. an organism that is not native and has negative effects on our economy, our environment, or our health
7. the growth rate constantly decreases with the increasing number of individuals
10. resource that can be regenerated quickly and replaceable
11. wise management of natural resources, including the preservation of of habitats and wildlife
17. farming strategy in which larger fields are planted with a single crop
18. a graphical illustration that shows the distribution of various age groups in a population
20. change in a population from high birth and death rates to low birth and death rates
23. a process caused by a combination of poor farming, overgrazing and drought
25. disappearance of a species
26. the total number of genetic characteristics in the genetic makeup of a species
27. a substance that pollutes something
28. raising of aquatic organisms
30. a gradual increase in the overall temperature of the earth's atmosphere

2. the effective number of different species that are represented in a collection of individuals
3. movement of individuals into an area occupied by an existing population
4. gray brown mixture of chemicals that occurs as a haze in the atmosphere
5. resource that cannot be replenished by natural process
6. the development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops
8. number of individuals per unit of area
9. the number or quantity of people or things that can be conveyed or held by a vehicle or container
12. the total of the variety of organisms in the biosphere
13. a region of the upper atmosphere
14. destruction of forests
15. causes the growth of a population to decrease
16. scientific study of human populations
19. growth whose rate becomes ever more rapid in proportion to the growing total number or size
21. the practice of farming
22. wearing away of surface soil by water and wind
24. movement of individuals out of an area
29. rain containing nitric and sulfuric acids