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 conversion of nitrates into nitrogen gas.






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






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






4. 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.






5. Animals which eat grass and roots.






6. 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.






7. A layer of gasses surrounding the earth.






8. 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.






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






10. Modern man.






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






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






13. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






14. 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.






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






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






17. 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.






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






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






20. 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






21. An international protocol designed to stabilize global warming.






22. 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.






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






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






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






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






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






28. 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.






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






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






31. Consumers which eat decomposing organic material.






32. Organisms which eat other organisms.






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






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






35. The uppermost atmospheric layer. Here satellites orbit the earth.






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






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






38. The rate at which producers create organic material.






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






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






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






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






43. 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.






44. All of the ecosystems on earth.






45. 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.






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






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






48. All of the water found on earth.






49. The flow of water in the water table.






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