Test your basic knowledge |

DSST Environment And Humanity

Subjects : dsst, science
  • Answer 50 questions in 15 minutes.
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  • 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. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.

3. 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.

4. The process of planting different plant species right next to each other to maximize one's yield.

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

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

7. Any living thing on earth.

8. Consumers which eat only other animals.

9. The rate at which producers create organic material.

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

11. A variety of species living together.

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

13. A law designed to locate toxic waste sites - gauge their pollution level - and ensure these sites are taken care of properly.

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

15. Animals which eat leaves and shoots.

16. The loss of water vapor from leaves.

17. Populations characterized by small size - short lifespan - and lots of offspring.

18. 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.

19. Modern man.

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. Animals which eat grass and roots.

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

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

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

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

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

27. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.

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

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

30. Organisms which consume autotrophs for food.

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

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

33. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.

34. 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.

35. A layer of gasses surrounding the earth.

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

37. Single-celled organisms which lack a nucleus.

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

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

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

41. 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.

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

43. Organisms which produce their own food.

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

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

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

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

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

49. Surface run-off caused by melted snow.

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