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 trees in between other crops.






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






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






4. An international protocol designed to stabilize global warming.






5. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






6. 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.






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






8. Organisms which eat other organisms.






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






10. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






11. Modern man.






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






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






14. All of the water found on earth.






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






16. 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.






17. A transitional area between two different ecosystems.






18. Consumers which eat both plants and animals.






19. 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.






20. All of the ecosystems on earth.






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






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






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






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






25. Organisms with a nucleus.






26. A type of symbiosis where one species benefit at the expense of the other.






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






28. Surface run-off caused by melted snow.






29. Organisms which produce their own food.






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






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






32. 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.






33. 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.






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






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






36. 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.






37. 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.






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






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






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






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






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






43. A group of similar organisms capable of interbreeding.






44. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49






45. The conversion of nitrates into nitrogen gas.






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






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






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






49. 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.






50. The crust and upper mantle of the earth.