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






2. An international protocol designed to stabilize global warming.






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






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






5. An act which required the EPA to set standards for drinking water.






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






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






8. Animals which eat grass and roots.






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






10. 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.






11. 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.






12. Any living thing on earth.






13. A variety of species living together.






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






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






16. A theory that our current ecological problems are a product of deeper social problems.






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






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






19. Modern man.






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






21. The loss of water vapor from leaves.






22. All of the water found on earth.






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






24. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






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






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






27. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.






28. The rate at which producers create organic material.






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






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






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






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






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






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






35. Organisms with a nucleus.






36. Consumers which eat only other animals.






37. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






39. 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






40. The middle atmospheric layer. Meteors burn up after entering this layer.






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






42. 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.






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






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






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






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






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






48. Growing more than one crop at a time.






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






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