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






2. 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.






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






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






5. A transitional area between two different ecosystems.






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






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






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






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






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






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






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






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






14. 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.






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






16. 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.






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






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






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






20. Organisms which consume autotrophs for food.






21. Single-celled organisms which lack a nucleus.






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






23. A variety of species living together.






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






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






26. The process of a substance passing directly from the solid phase to the gaseous phase - and vice versa.






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 uppermost atmospheric layer. Here satellites orbit the earth.






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






30. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.






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






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






33. The process of planting different plant species right next to each other to maximize one's yield.






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






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






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






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






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






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






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






41. Growing more than one crop at a time.






42. The loss of water vapor from leaves.






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






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






45. 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.






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






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






48. 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.






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






50. 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