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






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






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






4. 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.






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






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






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






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






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






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






11. Any living thing on earth.






12. Animals which eat grass and roots.






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






14. The flow of water in the water table.






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






16. 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.






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






18. 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.






19. The loss of water vapor from leaves.






20. 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.






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






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






23. 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.






24. 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.






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






26. Organisms which consume autotrophs for food.






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






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






29. Consumers which eat both plants and animals.






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






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






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






33. The conversion of nitrates into nitrogen gas.






34. 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.






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






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






37. Consumers which eat decomposing organic material.






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






39. The process of surface water entering the soil. This ensures that plants have adequate access to water.






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






41. 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.






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






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






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






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






46. A type of symbiosis where one species benefit at the expense of the other.






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






48. A transitional area between two different ecosystems.






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






50. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.







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