Across
- 3. succession newly exposed or newly formed rock is colonized by living things for the first time
- 8. capacity the number of people, or other living organisms that a region can support without environmental degradation.
- 9. a layer or a set of layers of gases surrounding a planet, that is held in place by gravity
- 10. the weather conditions prevailing in an area in general or over a long period
- 11. the removal of a forest or stand of trees from land that is then converted to non-forest use
- 14. density a measurement of population per unit area
- 17. resource is a natural resource which will replenish to replace the portion depleted by usage and consumption
- 18. warming a gradual increase in the overall temperature of the earth's atmosphere
- 20. a substance that pollutes something, especially water or the atmosphere
- 21. is the breakdown of organic matter by microorganisms, such as bacteria and fungi
- 22. growth growth whose rate becomes ever more rapid in proportion to the growing total number or size
- 23. any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere.
Down
- 1. resource is a natural resource that cannot be readily replaced by natural means at a quick enough pace to keep up with consumption
- 2. factor a variable of a system that causes a noticeable change in output or another measure of a type of system
- 4. layer is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation
- 5. species are hardy species which are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by fire.
- 6. the natural home or environment of an animal, plant, or other organism
- 7. the process by which large numbers of people become permanently concentrated in relatively small areas, forming cities
- 12. a number of all the organisms of the same group or species who live in a particular geographical area
- 13. effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere
- 15. Nina the sea surface temperature across the eastern equatorial part of the central Pacific Ocean will be lower than normal by 3 to 5 °C (5.4 to 9 °F)
- 16. is the worldwide sum of all ecosystems on a planet
- 19. succession an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance
- 24. air pollution that reduces visibility
- 25. Nino an irregularly occurring and complex series of climatic changes affecting the equatorial Pacific region and beyond every few years