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DSST Environment And Humanity

Subjects : dsst, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






2. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






3. A law designed to locate toxic waste sites - gauge their pollution level - and ensure these sites are taken care of properly.






4. All members of a species which live in the same area.






5. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






6. An influential book by Rachel Carson which helped begin the environmental movement.






7. The study of the interaction between organisms and their environment.






8. The spraying of pesticides to keep produce from any injuries or damage.






9. An international convention which created the framework for protecting the ozone layer.






10. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.






11. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.






12. All of the ecosystems on earth.






13. The process of a gas transforming into a liquid.






14. The rapid increase of harmful algae in a body of water.






15. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.






16. An extinct hominid species believed to exhibit the first example of full-time bipedalism.






17. Animals which eat leaves and shoots.






18. Evolution in one organism due to change in a related organism.






19. An agency created to establish regulations concerning pollutants to protect humans and the environment.






20. Any living thing on earth.






21. A layer of gasses surrounding the earth.






22. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.






23. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






24. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






25. Organisms which thrive in low nutrient environments and usually have slow growth rates.






26. Precipitation which does not reach the soil but is instead collected by plants.






27. The process of a substance passing directly from the solid phase to the gaseous phase - and vice versa.






28. A type of symbiosis where one species benefit at the expense of the other.






29. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






30. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






31. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.






32. The process of surface water entering the soil. This ensures that plants have adequate access to water.






33. A transitional area between two different ecosystems.






34. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






35. Populations characterized by large size - long lifespan - and few offspring.






36. An international organization designed to promote free trade between countries.






37. A UN conference that addressed the growing population problem.






38. Populations characterized by small size - short lifespan - and lots of offspring.






39. Excess water which cannot be infiltrated into the soil and instead flows along the ground.






40. The process by which certain kinds of bacteria convert atmospheric nitrogen gas into ammonia - a form accessible to living creatures.






41. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






42. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






43. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






44. Consumers which eat decomposing organic material.






45. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.






46. Political organizations not affiliated with the government which try to bring about social change.






47. Modern man.






48. An international protocol designed to stabilize global warming.






49. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






50. A community of species interacting with their nonliving (abiotic) environment.







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