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






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






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






5. 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.






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






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






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






9. The loss of water vapor from leaves.






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






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






12. Organisms which produce their own food.






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






14. A variety of species living together.






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






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






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






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






19. Animals which eat leaves and shoots.






20. Consumers which eat only other animals.






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






22. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






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






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






25. All of the ecosystems on earth.






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






27. 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.






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






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






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






31. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






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






33. A layer of gasses surrounding the earth.






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






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






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






37. 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.






38. 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.






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






40. All of the water found on earth.






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






42. 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.






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






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






46. 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.






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






48. 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.






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






50. The conversion of nitrates into nitrogen gas.