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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. 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.






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






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






4. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






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






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






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






8. The conversion of nitrates into nitrogen gas.






9. All of the water found on earth.






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






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






12. Growing more than one crop at a time.






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






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






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






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






17. Any living thing on earth.






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






19. Organisms which consume autotrophs for food.






20. All of the ecosystems on earth.






21. Consumers which eat decomposing organic material.






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






23. Plants taking in nitrates from the soil.






24. A group of similar organisms capable of interbreeding.






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






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






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






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






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






30. The rate at which producers create organic material.






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






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






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






34. 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.






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






36. A layer of gasses surrounding the earth.






37. The crust and upper mantle of the earth.






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






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






40. 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.






41. An international protocol designed to stabilize global warming.






42. Organisms which produce their own food.






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






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






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






46. Organisms which eat other organisms.






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






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






49. 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.






50. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49







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