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. 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.






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






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






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






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






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






7. Single-celled organisms which lack a nucleus.






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






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






10. A transitional area between two different ecosystems.






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






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






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






14. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.






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






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






17. The flow of water in the water table.






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






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






20. 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.






21. All of the ecosystems on earth.






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






23. The conversion of nitrates into nitrogen gas.






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






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






26. The loss of water vapor from leaves.






27. Precipitation which does not reach the soil but is instead collected by plants.






28. Consumers which eat decomposing organic material.






29. 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.






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






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






32. 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.






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






34. 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.






35. A type of farming where the farmer will grow crops both to fulfill his family's needs for the next year and to sell on the market.






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






37. Organisms which eat other organisms.






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






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






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






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






42. 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.






43. 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.






44. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






45. A layer of gasses surrounding the earth.






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






47. Growing only one crop at a time.






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






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






50. Surface run-off caused by melted snow.