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






2. 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.






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






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






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






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






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






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






9. All of the ecosystems on earth.






10. 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.






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






12. All of the water found on earth.






13. 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.






14. Consumers which eat both plants and animals.






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






16. A layer of gasses surrounding the earth.






17. The loss of water vapor from leaves.






18. Organisms which consume autotrophs for food.






19. A variety of species living together.






20. 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.






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






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






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






24. Organisms with a nucleus.






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






26. Organisms which create their own food out of inorganic (abiotic) substances.






27. The study of the interaction between organisms and their environment.






28. A transitional area between two different ecosystems.






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






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






31. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






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






33. Modern man.






34. Organisms which produce their own food.






35. Plants taking in nitrates from the soil.






36. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






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






38. 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.






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






40. Growing more than one crop at a time.






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






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






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






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






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






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






47. Any living thing on earth.






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






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






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