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. A variety of species living together.






2. 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.






3. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






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






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






6. 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.






7. A transitional area between two different ecosystems.






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






9. Consumers which eat decomposing organic material.






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 rapid increase of harmful algae in a body of water.






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






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






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






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






16. Growing only one crop at a time.






17. An act which protects certain lands as national parks.






18. Consumers which eat both plants and animals.






19. Animals which eat grass and roots.






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






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






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






23. A layer of gasses surrounding the earth.






24. 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






25. All of the water found on earth.






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






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






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






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






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






31. A group of similar organisms capable of interbreeding.






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






33. 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.






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






35. 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






36. 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.






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






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






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






40. 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.






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






42. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.






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






44. Growing more than one crop at a time.






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






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






47. 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.






48. Organisms which eat other organisms.






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






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