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






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






3. 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.






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






5. An international protocol designed to stabilize global warming.






6. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






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






8. Organisms which produce their own food.






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






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






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






12. Surface run-off caused by melted snow.






13. The rate at which producers create organic material.






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






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






16. 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.






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






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






19. Single-celled organisms which lack a nucleus.






20. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






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






22. Animals which eat leaves and shoots.






23. Organisms which eat other organisms.






24. 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.






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






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






27. The loss of water vapor from leaves.






28. 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






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






30. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.






31. All members of a species which live in the same area.






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






33. 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.






34. The flow of water in the water table.






35. 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.






36. 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.






37. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






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






39. A layer of gasses surrounding the earth.






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. Any living thing on earth.






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






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






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






45. 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.






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






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






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






49. Growing only one crop at a time.






50. A variety of species living together.