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






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






3. 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.






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






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






6. Growing more than one crop at a time.






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






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






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






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






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






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






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






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






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






17. 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.






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






19. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






20. 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






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






22. The conversion of nitrates into nitrogen gas.






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






24. 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.






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






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






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






28. The flow of water in the water table.






29. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






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






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






32. Surface run-off caused by melted snow.






33. Modern man.






34. Populations characterized by large size - long lifespan - and few offspring.






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






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






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






38. All of the water found on earth.






39. All of the ecosystems on earth.






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






41. 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.






42. Consumers which eat both plants and animals.






43. 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.






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






45. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






46. 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.






47. Growing only one crop at a time.






48. 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.






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






50. Consumers which eat only other animals.