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. Populations characterized by large size - long lifespan - and few offspring.






2. 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.






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






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






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






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






7. 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.






8. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






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






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






11. An international protocol designed to stabilize global warming.






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






13. Modern man.






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






15. The middle atmospheric layer. Meteors burn up after entering this layer.






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






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






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






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






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






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






22. 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.






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






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






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






26. A transitional area between two different ecosystems.






27. Single-celled organisms which lack a nucleus.






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






29. All of the water found on earth.






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






31. Organisms which produce their own food.






32. An international organization designed to promote free trade between countries.






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






34. 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.






35. 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.






36. The process of a substance passing directly from the solid phase to the gaseous phase - and vice versa.






37. Consumers which eat only other animals.






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






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






40. 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






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






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






43. A variety of species living together.






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






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






46. The crust and upper mantle of the earth.






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






48. 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.






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






50. Animals which eat grass and roots.