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






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






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






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






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






6. Plants taking in nitrates from the soil.






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






8. 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.






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






10. All of the water found on earth.






11. Different species living in close contact with each other.






12. Organisms which produce their own food.






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






14. Any living thing on earth.






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






16. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






17. An international protocol designed to stabilize global warming.






18. Single-celled organisms which lack a nucleus.






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






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






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






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






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






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






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






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






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






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






29. 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.






30. All of the ecosystems on earth.






31. Organisms which consume autotrophs for food.






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






33. Organisms which eat other organisms.






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






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






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






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






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






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






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






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






42. The conversion of nitrates into nitrogen gas.






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






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






45. Modern man.






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






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






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






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






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







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