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. Consumers which eat only other animals.






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






3. A variety of species living together.






4. Animals which eat grass and roots.






5. Growing more than one crop at a time.






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






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






8. An international protocol designed to stabilize global warming.






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






10. 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.






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






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






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






14. Surface run-off caused by melted snow.






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






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






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






18. A transitional area between two different ecosystems.






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






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






21. 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.






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






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






24. Consumers which eat decomposing organic material.






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






26. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






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






28. 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.






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






30. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






31. The flow of water in the water table.






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






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






34. 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






35. The conversion of nitrates into nitrogen gas.






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






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. Consumers which eat both plants and animals.






39. Organisms which produce their own food.






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






41. Single-celled organisms which lack a nucleus.






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






43. 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.






44. The loss of water vapor from leaves.






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






46. A layer of gasses surrounding the earth.






47. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






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






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






50. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.