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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 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.






2. Consumers which eat only other animals.






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






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






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






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






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






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






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






10. Different species living in close contact with each other.






11. The process of planting trees in between other crops.






12. Animals which eat grass and roots.






13. 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.






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






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






16. Growing more than one crop at a time.






17. Modern man.






18. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






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






20. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






21. The UN's first major conference on environmental issues.






22. Consumers which eat both plants and animals.






23. 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.






24. 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.






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






26. Organisms with a nucleus.






27. A partially enclosed part of the ocean with rivers or streams flowing into it.






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






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






30. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






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






32. The loss of water vapor from leaves.






33. Growing only one crop at a time.






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






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






36. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






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






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






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






40. 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.






41. Organisms which produce their own food.






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






43. A type of symbiosis where each species will benefit from interacting with the other.






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






45. The coexistence of two species using the same resource where the two will use the resource in different ways.






46. Organisms which consume autotrophs for food.






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






48. 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.






49. A group of similar organisms capable of interbreeding.






50. A variety of species living together.







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