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






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






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






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






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






6. Organisms with a nucleus.






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






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






9. 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.






10. An international protocol designed to stabilize global warming.






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






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






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






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






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






16. The conversion of nitrates into nitrogen gas.






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






18. The loss of water vapor from leaves.






19. 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.






20. The crust and upper mantle of the earth.






21. 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.






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






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






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






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






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






27. Animals which eat leaves and shoots.






28. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






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






31. A transitional area between two different ecosystems.






32. 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.






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






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






35. Organisms which consume autotrophs for food.






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






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






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






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






40. The UN's first major conference on environmental issues.






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






42. Consumers which eat decomposing organic material.






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






44. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






45. Surface run-off caused by melted snow.






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






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






48. Consumers which eat both plants and animals.






49. All of the ecosystems on earth.






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