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. 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.






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






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






4. Growing only one crop at a time.






5. Consumers which eat only other animals.






6. Organisms which consume autotrophs for food.






7. All of the ecosystems on earth.






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






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






10. 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.






11. The loss of water vapor from leaves.






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






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






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






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






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






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






18. The rate at which producers create organic material.






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






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






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






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






23. The crust and upper mantle of the earth.






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






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






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






27. Surface run-off caused by melted snow.






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






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






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






31. Single-celled organisms which lack a nucleus.






32. An act which established and enforced acceptable levels of air pollution.






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






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






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






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






37. 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.






38. Organisms which produce their own food.






39. All members of a species which live in the same area.






40. 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.






41. 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.






42. An international protocol designed to stabilize global warming.






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






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






45. Growing more than one crop at a time.






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






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






48. 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.






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






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