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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. 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.






2. The flow of water in the water table.






3. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






4. Organisms which eat other organisms.






5. Animals which eat grass and roots.






6. 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.






7. 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.






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






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






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






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






12. 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.






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






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






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






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






17. All of the water found on earth.






18. 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






19. The loss of water vapor from leaves.






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






21. Any living thing on earth.






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






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






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






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






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






27. Consumers which eat both plants and animals.






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






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






30. The rapid increase of harmful algae in a body of water.






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






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






33. A group of similar organisms capable of interbreeding.






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






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






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






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






38. All of the ecosystems on earth.






39. The crust and upper mantle of the earth.






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






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






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






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






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






45. Animals which eat leaves and shoots.






46. Surface run-off caused by melted snow.






47. Plants taking in nitrates from the soil.






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






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






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







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