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






2. 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.






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






4. A type of symbiosis where each species will benefit from interacting with the other.






5. 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.






6. 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






7. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






8. Animals which eat leaves and shoots.






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






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






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






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






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






14. Organisms which consume autotrophs for food.






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






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






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






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






19. Growing more than one crop at a time.






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






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






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






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






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






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






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






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






28. 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.






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






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






31. 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.






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






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






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






35. Consumers which eat decomposing organic material.






36. Surface run-off caused by melted snow.






37. Consumers which eat only other animals.






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






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






40. A layer of gasses surrounding the earth.






41. A transitional area between two different ecosystems.






42. An extinct hominid species believed to exhibit the first example of full-time bipedalism.






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






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






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






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






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






48. 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.






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






50. The rate at which producers create organic material.