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. Consumers which eat only other animals.






2. 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.






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






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






5. Single-celled organisms which lack a nucleus.






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






7. Organisms which produce their own food.






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






9. 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.






10. Plants taking in nitrates from the soil.






11. A UN conference that addressed the growing population problem.






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






13. All of the water found on earth.






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






15. Consumers which eat both plants and animals.






16. The spraying of pesticides to keep produce from any injuries or damage.






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






18. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






19. A community of species interacting with their nonliving (abiotic) environment.






20. The rate at which producers create organic material.






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






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






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. 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.






25. Growing more than one crop at a time.






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






27. The conversion of nitrates into nitrogen gas.






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






29. Organisms which consume autotrophs for food.






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






31. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.






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






33. 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.






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






35. 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.






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






37. An international protocol designed to stabilize global warming.






38. A variety of species living together.






39. 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.






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






41. 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.






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






43. The flow of water in the water table.






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






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






46. 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.






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






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






49. 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.






50. 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.