Test your basic knowledge |

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 process of a gas transforming into a liquid.






2. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






3. The flow of water in the water table.






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






5. 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






6. An act requiring federal agencies to detail the impact of proposed environmental policies.






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






8. All of the water found on earth.






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






10. Organisms which produce their own food.






11. 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.






12. 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.






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






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






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






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






17. 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.






18. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






19. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






20. A rainforest in the temperate zone which receives heavy rainfall.






21. Organisms which eat other organisms.






22. 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.






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






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






25. Organisms which consume autotrophs for food.






26. Animals which eat leaves and shoots.






27. Consumers which eat only other animals.






28. 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.






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






30. Modern man.






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






32. An extinct hominid species believed to be the last common ancestor between man and apes.






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






34. A transitional area between two different ecosystems.






35. Growing only one crop at a time.






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






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






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






39. 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.






40. Animals which eat grass and roots.






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






42. The rate at which producers create organic material.






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






44. 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.






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






46. Any living thing on earth.






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






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






49. The crust and upper mantle of the earth.






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