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






2. Animals which eat grass and roots.






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






4. Animals which eat leaves and shoots.






5. 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.






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






7. Consumers which eat only other animals.






8. 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






9. Evolution in one organism due to change in a related organism.






10. The process of surface water entering the soil. This ensures that plants have adequate access to water.






11. 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.






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






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






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






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






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






17. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.






18. 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






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






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






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






22. An international convention which created the framework for protecting the ozone layer.






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






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






25. Organisms with a nucleus.






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






27. 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.






28. 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.






29. The position of an organism on the food chain.






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






31. The process of a gas transforming into a liquid.






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






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






34. Modern man.






35. 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.






36. 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.






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






38. A transitional area between two different ecosystems.






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






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






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






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






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






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






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






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






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






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






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