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






2. An influential book by Rachel Carson which helped begin the environmental movement.






3. Growing more than one crop at a time.






4. The conversion of nitrates into nitrogen gas.






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






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






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






8. Organisms which produce their own food.






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






10. The crust and upper mantle of the earth.






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






12. Animals which eat leaves and shoots.






13. 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.






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






15. Modern man.






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






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






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






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






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






21. 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.






22. 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.






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






24. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






25. Populations characterized by small size - short lifespan - and lots of offspring.






26. Growing only one crop at a time.






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






28. Consumers which eat only other animals.






29. The rate at which producers create organic material.






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






31. A layer of gasses surrounding the earth.






32. A transitional area between two different ecosystems.






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






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






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






36. The loss of water vapor from leaves.






37. 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.






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






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






40. Organisms with a nucleus.






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






42. 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






43. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.






44. Plants taking in nitrates from the soil.






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






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






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






48. Organisms which eat other organisms.






49. Single-celled organisms which lack a nucleus.






50. A partially enclosed part of the ocean with rivers or streams flowing into it.