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. Consumers which eat only other animals.






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






4. 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.






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






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






7. Consumers which eat both plants and animals.






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






9. 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.






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






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






12. All of the ecosystems on earth.






13. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






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






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






16. Political organizations not affiliated with the government which try to bring about social change.






17. A variety of species living together.






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






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






20. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49






21. 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






22. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






23. Single-celled organisms which lack a nucleus.






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






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






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






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






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






29. Organisms which create their own food out of inorganic (abiotic) substances.






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






31. Modern man.






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






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






34. The process of planting trees in between other crops.






35. Animals which eat grass and roots.






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






37. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.






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






39. Plants taking in nitrates from the soil.






40. All of the water found on earth.






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






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






43. Organisms which thrive in low nutrient environments and usually have slow growth rates.






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






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






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






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






48. A layer of gasses surrounding the earth.






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






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