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






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






3. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






4. Growing more than one crop at a time.






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






6. A transitional area between two different ecosystems.






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






8. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






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






10. Organisms with a nucleus.






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






12. 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.






13. 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.






14. Organisms which thrive in low nutrient environments and usually have slow growth rates.






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






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






17. Modern man.






18. A rainforest in the temperate zone which receives heavy rainfall.






19. Animals which eat leaves and shoots.






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






21. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






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






23. Organisms which consume autotrophs for food.






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






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






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






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






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






29. Plants taking in nitrates from the soil.






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






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






32. 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.






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






34. The crust and upper mantle of the earth.






35. Any living thing on earth.






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






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






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






39. Consumers which eat only other animals.






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






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






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






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






44. The loss of water vapor from leaves.






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






46. An extinct hominid species believed to be the last common ancestor between man and apes.






47. 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.






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






49. 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.






50. The process of planting different plant species right next to each other to maximize one's yield.