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. Single-celled organisms which lack a nucleus.






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






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






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






5. Modern man.






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






7. The uppermost atmospheric layer. Here satellites orbit the earth.






8. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






9. 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.






10. A layer of gasses surrounding the earth.






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






12. The crust and upper mantle of the earth.






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






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






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






16. Excess water which cannot be infiltrated into the soil and instead flows along the ground.






17. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






18. Animals which eat leaves and shoots.






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






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






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






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






23. Exceptionally acidic (low pH) rain. This phenomenon is caused mainly by emissions of carbon dioxide - sulfur dioxide - and nitrogen oxide which react with water particles in the air.






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






25. 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.






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






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






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






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






30. Political organizations not affiliated with the government which try to bring about social change.






31. 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.






32. 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.






33. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






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






35. 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.






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






37. The conversion of nitrates into nitrogen gas.






38. An international protocol designed to stabilize global warming.






39. The process of a gas transforming into a liquid.






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






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






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






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






44. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






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






46. Organisms which eat other organisms.






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






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






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






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