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. 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.






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






3. Animals which eat grass and roots.






4. 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.






5. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






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






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






8. A type of symbiosis where each species will benefit from interacting with the other.






9. The flow of water in the water table.






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






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






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






13. A partially enclosed part of the ocean with rivers or streams flowing into it.






14. Growing only one crop at a time.






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






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






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






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






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






20. Growing more than one crop at a time.






21. A group of similar organisms capable of interbreeding.






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






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






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






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






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






27. 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.






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






29. Consumers which eat decomposing organic material.






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






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






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






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






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






35. All of the water found on earth.






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






37. Organisms with a nucleus.






38. 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.






39. 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.






40. An international protocol designed to stabilize global warming.






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






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






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






44. 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.






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






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






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






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






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






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