Test your basic knowledge |

Global Warming

Subjects : literacy, 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. Heat is provided by outside sources that flow down the continental slope to reach the deepest part of the glacier. High pressure decreases the melting point and favors melting.






2. By contrast reflects only about 7% of solar radiation (Albedo~7%) - absorbing 93%.






3. Number of days when temperatures climb above average by a fixed amount.






4. Precipitation intensity will rise ___ for every 1 OC of warming.






5. The air can hold less water vapor - Consequently - less water can be evaporated in the air - and only a small portion of energy is used in this process - Most of the energy that reaches the Arctic goes directly into warming the air






6. How often does El Nio occur?






7. In average: +1% in respect to 100 years ago.






8. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






9. Frozen +2 years - Few centimeters to 1500 m






10. Peru and Ecuador to the equatorial central pacific - Causes irregular warming in sea surface






11. Is best viewed as a combination of...- Natural Variability - Associated with atmospheric circulation patterns - Growing Radiative Forcing - Associated with rising concentrations of atmospheric greenhouse gases - Strongly suggests a human influence.






12. he increase of ozone concentration in the atmosphere helps ____ our planet






13. Arctic troposphere is thinner (8-10 km) than the tropics...The depth of the atmospheric layer is much shallower in the Arctic - It takes less energy to warm the Arctic rather than the Tropics - Same as heating an apartment vs. a house






14. A climate forcing agent formed through the incomplete combustion of fossil fuels - biofuel - and biomass; emitted both anthropogenic:ally and naturally.






15. The order of 1 m/year. Melting is ten times more.






16. Water vapor - 36-70% - carbon dioxide - 9-26% - methane - 4-9% - ozone - 3-7%






17. Average molecular life span is less than 10 years - Major sources: Wetlands and oceans - Raising cattle and landfills.






18. Higher temperature increases atmospheric water vapor @ global scale more water vapor in the air that causes nights to stay warmer.






19. Atmospheric Cooling - Both negative (stabilizing) feedbacks - It is not happening now - but it has happened in the past - Ice-albedo feedback was the dominant feedback during the ice ages.






20. Pockets of ice in the topmost permafrost caused by thawing which create an underground lake.






21. Ice melting rapidly? What type causes sea level to rise? What have been the main contributors to sea level rise so far? What are the impacts of melting ice? - On nature - On humans






22. By contrast reflects only about 7% of solar radiation (Albedo~7%) - absorbing 93%.






23. 1. Keeps the ocean and the earth cooler 2. Coastal impacts of ice: prevents waves from eroding coastlines and protects from storms. 3. Ecological importance of ice: a. Most visibly for the many fish - birds - and mammal species that live in - on - or






24. They saw a massive thinning of the ice where it enters into the ocean - This is due to the pronounced melting of the ice once it is in contact with the ocean. Melt rates of 25 m/year near the grounding lines and more than 10 m/year on average.






25. High vs low






26. The buoyant force is equal to the weight of the displaced water.

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27. Where does the ozone protect us?






28. Grounding line is the last portion of a glacier grounded to bedrock - after this line there are ice shelves - Glaciers contribute to sea level rise after passing the grounding line - Maximum thinning at grounding line.






29. Laser radar - H V - Long time series - high accuracy - Density






30. Total absorbed solar radiation






31. Water vapor means more water up in the clouds and less in the ground!






32. 10 : 1 - grounding ; surface






33. Atmosphere retains ____ CO2






34. Like weighing oneself on the scale.






35. CO2 - CH4 - O3 - H2O - N2O - CFCs






36. SMB- mass balance due to processes that affect the surface of the ice sheet. Precipitation- evapotranspiration-runoff-blowing snow etc.






37. Absolute thresholds - Monthly maximums and minimums - Threshold departures - Percentile departure - Atmospheric Water Vapor: More water vapor in the air - warmer nights!






38. Mass balance due to processes that affect the surface of the ice sheet. Precipitation-evapotranspiration-runoff-blowing snow etc...






39. Refers to a body of freshwater - usually shallow - formed in a depression by melt water from thawing permafrost.






40. Closed talik can develop when lakes fill in with sediment and become deposits of dead plant material (bog).






41. Set up in 1988 by WMO and UNEP.






42. Over the Northern Hemisphere than the tropics.






43. Permafrost- A frozen soil






44. Surface Mass Balance is of the order of _____ melting is ____ times more.






45. Deep tropics between 15O N and 15 O S are quite rainy on yearly average. In these regions - rising air predominates.






46. The last portion of a glacier grounded to bedrock - after this line there are ice shelves.






47. 78% nitrogen - 28% oxygen - Greenhouse gases: Have a more complex molecular structure and can absorb and re:radiate heat in all directions.






48. Hydrological drought is associated with the effect of low rainfall on water levels in rivers -!reservoirs -!lakes and aquifers.






49. At the bottom of the ice sheets the temperature doesn't necessarily have to be above 0... it could _____ more easily because of the water






50. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2