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






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






3. 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.






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






5. The rate at which producers create organic material.






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






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






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






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






10. Any living thing on earth.






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






12. 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.






13. 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






14. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.






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






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






17. A layer of gasses surrounding the earth.






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






19. 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.






20. All of the ecosystems on earth.






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






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






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






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






25. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.






26. Organisms which eat other organisms.






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






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






29. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






30. Consumers which eat only other animals.






31. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






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






33. 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.






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






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






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






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






38. 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.






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






40. Consumers which eat decomposing organic material.






41. 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.






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






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






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






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






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






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






48. A theory that our current ecological problems are a product of deeper social problems.






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






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







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