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 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.






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






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






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






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






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






7. An international protocol designed to stabilize global warming.






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






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






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






11. 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.






12. Organisms which consume autotrophs for food.






13. 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.






14. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






15. Surface run-off caused by melted snow.






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






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






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






19. 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.






20. Single-celled organisms which lack a nucleus.






21. Animals which eat grass and roots.






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






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






24. A variety of species living together.






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






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






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






28. The rapid increase of harmful algae in a body of water.






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






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






31. The loss of water vapor from leaves.






32. Modern man.






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






34. Average expected birth rate for 1 -000 women.






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






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






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






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






39. Animals which eat leaves and shoots.






40. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.






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






42. 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.






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






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






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






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






47. 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.






48. Growing more than one crop at a time.






49. 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.






50. A transitional area between two different ecosystems.