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Limnetic Zone : open water area filled with plankton
Plankton : free floating photosynthetic autotrophs that live in freshwater or marine ecosystems
Profundal Zone : deepest areas of a large lake
Abyssal Zone : Deepest region in the ocean
Density depending Factors : biotic factors that could change population
Demography : study of human populatin size, density, distribution, movement, birth and death rates.
Demographic transformation : a change in a population from high birth and death rates to low birth and death rates
Zero population growth : when birth rate equals death rate
Age structure : number of males and females in each of three age groups: pre reproductive stage, reproductive stage, and post reproductive stage
Ecosystem Diversity : various ecosystems in a biosphere
Background extinction : gradual process of a species becoming extinct
Mass extinction : an event when a large percentage of all living species will become extinct
Natural resources : all materials found in the biosphere.
Overexploitation : excessive use of a species with economical value
Habitat fragmentation : separation of an ecosystem into small pieces of land
Biological Magnification : increasing concentration of chemicals going throughout the trophic levels
Introduced Species : nonnative species either intentionally or unintentionally introduced to a new habitat
Renewable resource : resources that are replaced by its natural process faster than it is being consumed
Nonrenewable source : limited amount of resources found on earth that take an extreme amount of time to reproduce
SB4-D
Across:2. | resources that are replaced by its natural process faster than it is being consumed | 3. | excessive use of a species with economical value | 4. | limited amount of resources found on earth that take an extreme amount of time to reproduce | 6. | nonnative species either intentionally or unintentionally introduced to a new habitat | 7. | gradual process of a species becoming extinct |
| 8. | when birth rate equals death rate | 11. | Deepest region in the ocean | 15. | deepest areas of a large lake | 16. | all materials found in the biosphere. |
| | Down:1. | a change in a population from high birth and death rates to low birth and death rates | 5. | separation of an ecosystem into small pieces of land | 9. | an event when a large percentage of all living species will become extinct | 10. | study of human populatin size, density, distribution, movement, birth and death rates. |
| 12. | free floating photosynthetic autotrophs that live in freshwater or marine ecosystems | 13. | open water area filled with plankton | 14. | number of males and females in each of three age groups: pre reproductive stage, reproductive stage, and post reproductive stage |
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© 2015
PuzzleFast.com, Noncommercial Use Only
SB4-D
Across:2. | resources that are replaced by its natural process faster than it is being consumed | 3. | excessive use of a species with economical value | 4. | limited amount of resources found on earth that take an extreme amount of time to reproduce | 6. | nonnative species either intentionally or unintentionally introduced to a new habitat | 7. | gradual process of a species becoming extinct |
| 8. | when birth rate equals death rate | 11. | Deepest region in the ocean | 15. | deepest areas of a large lake | 16. | all materials found in the biosphere. |
| | Down:1. | a change in a population from high birth and death rates to low birth and death rates | 5. | separation of an ecosystem into small pieces of land | 9. | an event when a large percentage of all living species will become extinct | 10. | study of human populatin size, density, distribution, movement, birth and death rates. |
| 12. | free floating photosynthetic autotrophs that live in freshwater or marine ecosystems | 13. | open water area filled with plankton | 14. | number of males and females in each of three age groups: pre reproductive stage, reproductive stage, and post reproductive stage |
| |
© 2015
PuzzleFast.com, Noncommercial Use Only