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. Growing more than one crop at a time.






2. A transitional area between two different ecosystems.






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






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






5. An act which established and enforced acceptable levels of air pollution.






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






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






8. The conversion of nitrates into nitrogen gas.






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






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






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






12. The rate at which producers create organic material.






13. The study of the interaction between organisms and their environment.






14. An international protocol designed to stabilize global warming.






15. 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.






16. Plants taking in nitrates from the soil.






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






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






19. Single-celled organisms which lack a nucleus.






20. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






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






22. The loss of water vapor from leaves.






23. 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.






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






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






26. Consumers which eat decomposing organic material.






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






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






29. Populations characterized by large size - long lifespan - and few offspring.






30. Modern man.






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






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






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






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






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






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






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






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






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






40. 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






41. The UN's first major conference on environmental issues.






42. 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.






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






44. Surface run-off caused by melted snow.






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






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






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






48. 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.






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






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