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






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






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






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






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






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






7. Animals which eat leaves and shoots.






8. 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.






9. All of the ecosystems on earth.






10. 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.






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






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






13. Growing only one crop at a time.






14. 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






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






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






17. Consumers which eat only other animals.






18. 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.






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






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






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






22. Animals which eat grass and roots.






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






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






25. The process by which pollutants are carried by flowing water - such as a river.






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






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






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






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






30. All of the water found on earth.






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






33. 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.






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






35. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






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






37. The loss of water vapor from leaves.






38. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






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






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






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






42. 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.






43. Organisms which thrive in low nutrient environments and usually have slow growth rates.






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






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






46. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






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






48. Surface run-off caused by melted snow.






49. Growing more than one crop at a time.






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







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