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 crust and upper mantle of the earth.






2. Growing more than one crop at a time.






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






4. Consumers which eat decomposing organic material.






5. 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.






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






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






8. A variety of species living together.






9. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






10. Surface run-off caused by melted snow.






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






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






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






14. Organisms which consume autotrophs for food.






15. 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.






16. Modern man.






17. The flow of water in the water table.






18. 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.






19. Animals which eat grass and roots.






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






21. 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.






22. 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.






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






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






25. 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.






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






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






28. The loss of water vapor from leaves.






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






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






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






32. Consumers which eat both plants and animals.






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






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






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






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






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






38. The rate at which producers create organic material.






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






40. The UN's first major conference on environmental issues.






41. 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.






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






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






44. An international protocol designed to stabilize global warming.






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






46. An agency created to establish regulations concerning pollutants to protect humans and the environment.






47. A group of similar organisms capable of interbreeding.






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






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






50. 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.