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 layer of gasses surrounding the earth.






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






3. An act which required the EPA to set standards for drinking water.






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






5. Organisms which consume autotrophs for food.






6. Animals which eat grass and roots.






7. The conversion of nitrates into nitrogen gas.






8. A transitional area between two different ecosystems.






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






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






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






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






13. The loss of water vapor from leaves.






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






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






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






17. Any living thing on earth.






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






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






20. Political organizations not affiliated with the government which try to bring about social change.






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






22. A variety of species living together.






23. 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.






24. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






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






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






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






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






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






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






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






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






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






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






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






36. Consumers which eat only other animals.






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






38. Organisms with a nucleus.






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






40. 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.






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






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






43. 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.






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






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






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






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






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






49. 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.






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