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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. A variety of species living together.






2. The process by which pollutants are carried by flowing water - such as a river.






3. A greenhouse gas which also plays a key role in regulating ozone levels.






4. An act which established and enforced acceptable levels of air pollution.






5. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






6. A layer of gasses surrounding the earth.






7. The process of planting different plant species right next to each other to maximize one's yield.






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






9. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






10. The conversion of nitrates into nitrogen gas.






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






12. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






13. An act which set standards for the amount of pollution in water.






14. Consumers which eat decomposing organic material.






15. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






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






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






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






19. A group of similar organisms capable of interbreeding.






20. An act which protects certain lands as national parks.






21. The position of an organism on the food chain.






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






23. The second atmospheric layer. The ozone layer is found here - increasing the temperature with altitude.






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






25. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






26. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






27. 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.






28. Organisms with a nucleus.






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






30. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






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






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






33. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






34. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.






35. An act created to protect endangered and threatened species.






36. Single-celled organisms which lack a nucleus.






37. The crust and upper mantle of the earth.






38. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.






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






40. The amount of pests needed before spraying pesticides is economical.






41. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.






42. 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.






43. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.






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






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






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






47. Exceptionally acidic (low pH) rain. This phenomenon is caused mainly by emissions of carbon dioxide - sulfur dioxide - and nitrogen oxide which react with water particles in the air.






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






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






50. Consumers which eat both plants and animals.







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