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 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






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






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






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






5. 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.






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






7. A group of similar organisms capable of interbreeding.






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






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






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






11. Any living thing on earth.






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






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






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






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






16. 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.






17. Organisms with a nucleus.






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






19. 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.






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






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






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






23. 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.






24. 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.






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






26. 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.






27. A variety of species living together.






28. Consumers which eat only other animals.






29. Organisms which eat other organisms.






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






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






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






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






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






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






36. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.






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






38. The flow of water in the water table.






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






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






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






42. Plants taking in nitrates from the soil.






43. An international protocol designed to stabilize global warming.






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






45. Organisms which consume autotrophs for food.






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






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






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






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






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