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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 UN's first major conference on environmental issues.






2. Plants taking in nitrates from the soil.






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






4. Growing more than one crop at a time.






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






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






7. The process of planting different plant species right next to each other to maximize one's yield.






8. 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.






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






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






11. All of the water found on earth.






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






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






14. 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






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






16. Animals which eat grass and roots.






17. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






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






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






20. A rainforest in the temperate zone which receives heavy rainfall.






21. Organisms which eat other organisms.






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






23. 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.






24. Consumers which eat only other animals.






25. An international protocol designed to stabilize global warming.






26. Consumers which eat decomposing organic material.






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






28. The loss of water vapor from leaves.






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






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






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






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






33. Modern man.






34. 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.






35. 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.






36. A variety of species living together.






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






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






39. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






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






41. 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.






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






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






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






45. 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.






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






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






48. 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.






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






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







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