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






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






3. The loss of water vapor from leaves.






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






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






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






7. The rate at which producers create organic material.






8. 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.






9. 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.






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






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






12. 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.






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






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






15. 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.






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






17. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






18. 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.






19. Organisms which eat other organisms.






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






21. 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.






22. The crust and upper mantle of the earth.






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






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






25. Excess water which cannot be infiltrated into the soil and instead flows along the ground.






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






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






28. Organisms with a nucleus.






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






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






31. Any living thing on earth.






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






33. 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.






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






35. A type of symbiosis where each species will benefit from interacting with the other.






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






37. 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.






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






39. Plants taking in nitrates from the soil.






40. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






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






42. 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.






43. All of the ecosystems on earth.






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






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






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






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






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






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






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







Sorry!:) No result found.

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