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






2. Organisms with a nucleus.






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






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






5. Modern man.






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






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






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






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






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






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






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






13. Growing more than one crop at a time.






14. The conversion of nitrates into nitrogen gas.






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






16. Any living thing on earth.






17. A group of similar organisms capable of interbreeding.






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






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






20. Single-celled organisms which lack a nucleus.






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






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






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






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






25. Organisms which consume autotrophs for food.






26. 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.






27. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






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






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






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






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






32. Surface run-off caused by melted snow.






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






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






35. A layer of gasses surrounding the earth.






36. Organisms which eat other organisms.






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






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






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






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






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






43. An international protocol designed to stabilize global warming.






44. The crust and upper mantle of the earth.






45. 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.






46. Consumers which eat only other animals.






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






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






49. 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.






50. Consumers which eat both plants and animals.