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






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






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






4. Organisms which consume autotrophs for food.






5. 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.






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






7. The crust and upper mantle of the earth.






8. An international protocol designed to stabilize global warming.






9. 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.






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






11. 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






12. Animals which eat leaves and shoots.






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






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






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






16. Modern man.






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






18. 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.






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






20. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






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






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






23. 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.






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






25. The loss of water vapor from leaves.






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






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






28. All of the water found on earth.






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






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






31. Consumers which eat only other animals.






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






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






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






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






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






37. 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.






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






39. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






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






41. Plants taking in nitrates from the soil.






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






43. A transitional area between two different ecosystems.






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






45. Any living thing on earth.






46. 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






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






48. 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.






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






50. 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.







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