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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. 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






2. 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.






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






4. The place of an organism in an ecosystem - such as what it eats and how it interacts with other organisms.






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






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






7. An international protocol designed to stabilize global warming.






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






9. Average expected birth rate for 1 -000 women.






10. 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.






11. The rate at which producers create organic material.






12. 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.






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






14. A type of farming where the farmer will grow crops both to fulfill his family's needs for the next year and to sell on the market.






15. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49






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






17. The spraying of pesticides to prevent a pest problem before it happens.






18. The conversion of nitrates into nitrogen gas.






19. Organisms which thrive in high nutrient environments - especially those with plenty of carbon.






20. A community of similar living organisms largely affected by the area's climate.






21. Animals which eat grass and roots.






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






23. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






24. Consumers which eat both plants and animals.






25. Modern man.






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






27. 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.






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






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






30. Organisms which create their own food out of inorganic (abiotic) substances.






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






32. Plants taking in nitrates from the soil.






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






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






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






36. 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.






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






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






39. Animals which eat leaves and shoots.






40. Single-celled organisms which lack a nucleus.






41. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






42. 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.






43. All of the ecosystems on earth.






44. The cloudiness of a liquid due to small suspended particles.






45. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






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






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






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






49. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






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







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