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






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






3. Animals which eat grass and roots.






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






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






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






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






8. 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.






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






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






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






12. The conversion of nitrates into nitrogen gas.






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






14. Animals which eat leaves and shoots.






15. A group of similar organisms capable of interbreeding.






16. Organisms with a nucleus.






17. 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.






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






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






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






21. Consumers which eat decomposing organic material.






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






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






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






25. Consumers which eat both plants and animals.






26. 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.






27. A variety of species living together.






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






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






30. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.






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






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






33. All of the water found on earth.






34. The crust and upper mantle of the earth.






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






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






37. The rate at which producers create organic material.






38. 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.






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






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






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






42. 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.






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






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






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






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






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






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






49. The place of an organism in an ecosystem - such as what it eats and how it interacts with other organisms.






50. 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.