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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. 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.






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






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






4. 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.






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






6. Consumers which eat decomposing organic material.






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






8. Organisms which eat other organisms.






9. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






10. 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.






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






12. Growing more than one crop at a time.






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






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






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






16. Consumers which eat only other animals.






17. Surface run-off caused by melted snow.






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






19. 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.






20. A greenhouse gas which also plays a key role in regulating ozone levels.






21. Animals which eat leaves and shoots.






22. 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.






23. 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.






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






25. 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.






26. All of the water found on earth.






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






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






29. Single-celled organisms which lack a nucleus.






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






31. 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.






32. Organisms which produce their own food.






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






34. The loss of water vapor from leaves.






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






36. An act which required the EPA to set standards for drinking water.






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






38. An international protocol designed to stabilize global warming.






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






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






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






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






43. 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.






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






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






46. The rate at which producers create organic material.






47. Modern man.






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






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






50. Animals which eat grass and roots.






Can you answer 50 questions in 15 minutes?



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