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 process of planting different plant species right next to each other to maximize one's yield.






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






3. 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






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






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






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






7. Animals which eat grass and roots.






8. 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.






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






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






11. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






12. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






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






14. Consumers which eat both plants and animals.






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






16. Growing only one crop at a time.






17. 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.






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






19. Organisms which eat other organisms.






20. The rate at which producers create organic material.






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






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






23. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






24. 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.






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






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






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






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






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






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






31. Growing more than one crop at a time.






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






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






34. Surface run-off caused by melted snow.






35. A layer of gasses surrounding the earth.






36. Animals which eat leaves and shoots.






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






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






39. Single-celled organisms which lack a nucleus.






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






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






42. 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.






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






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






45. 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.






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






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






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






49. 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.






50. 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.