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. A transitional area between two different ecosystems.






2. A layer of gasses surrounding the earth.






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






4. Organisms which consume autotrophs for food.






5. The conversion of nitrates into nitrogen gas.






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






7. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






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. 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






10. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






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






12. Organisms with a nucleus.






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






14. Modern man.






15. Animals which eat grass and roots.






16. 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.






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






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






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






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






21. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.






22. Organisms which eat other organisms.






23. The flow of water in the water table.






24. Single-celled organisms which lack a nucleus.






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






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






27. Consumers which eat both plants and animals.






28. Surface run-off caused by melted snow.






29. 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.






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






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






32. A UN conference that addressed the growing population problem.






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






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






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






36. 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.






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






38. 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.






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






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






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






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






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






44. All of the water found on earth.






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






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






47. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






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






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






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