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. Organisms which produce their own food.






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






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






4. 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.






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






8. 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.






9. An international protocol designed to stabilize global warming.






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






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






12. Consumers which eat both plants and animals.






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






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






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






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






17. 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






18. All of the water found on earth.






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






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






21. The crust and upper mantle of the earth.






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






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






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






25. 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.






26. The study of the interaction between organisms and their environment.






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






28. 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






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






30. Any living thing on earth.






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






32. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






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






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






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






36. A group of similar organisms capable of interbreeding.






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






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






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






40. 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.






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






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






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






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






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






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






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






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






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






50. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.