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. Organisms which thrive in high nutrient environments - especially those with plenty of carbon.






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






3. A layer of gasses surrounding the earth.






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






5. The rate at which producers create organic material.






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






7. Any living thing on earth.






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






9. Single-celled organisms which lack a nucleus.






10. Consumers which eat only other animals.






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






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






13. 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.






14. 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.






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






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






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






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






19. Growing more than one crop at a time.






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






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






22. An international organization designed to promote free trade between countries.






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






24. Organisms which consume autotrophs for food.






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






26. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






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






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






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






30. Growing only one crop at a time.






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






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






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






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






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






36. An influential book by Rachel Carson which helped begin the environmental movement.






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






38. All of the water found on earth.






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






40. Surface run-off caused by melted snow.






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






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






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






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






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






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






47. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.






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






49. 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






50. Organisms which eat other organisms.