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






2. High clouds are a ____ feedback; larger greenhouse warming - Clouds reflect shortwave radiation but also absorb longwave radiation






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






4. Number of days that exceed a given temperature






5. Precipitation extremes appear to generally increase across the planet at especially high latitudes.






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






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






8. Forms in a mosaic of favoured locations.






9. What can cause a change in the Earth's climate balance?






10. Summer increase in cloud cover - Winter decrease in cloud cover.

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11. Floating extensions are ice shelves - rivers of ice are ice streams or outlet glaciers - the junctions with the ocean are called the grounding line.






12. ~10% of incident solar energy (albedo 90)






13. CO2 ____ in winter in the NH and ____ decreases during the 'greening season'






14. Clouds 40~90% - Vegetation 10~15%






15. Cooler water and drought conditions.






16. 23 -45 degrees. The Larger the tilt the larger the variability of the seasons.

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17. Changes in the Earth's solar radiation levels can impact the climate. Shortterm warming cycles on Earth.






18. CO2 GHG forcing - H2O - dominant/major GHG






19. Where do greenhouse gases warm up the Earth?






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






21. Warming- positive feedback - Cooling- negative feedback.






22. Longwave radiation - any radiation with a long wave will heat up quickly.






23. The large-scale ocean circulation that moves water between the deep and surface ocean which effects salinity and temperature change - Supplies heat to the polar-regions.






24. Is not an externally imposed perturbation to the climate system.






25. The land-surface configuration that results from the melting of ground ice in a region where permafrost degrades is called Thermokarst.






26. South polar vortex - Temperatures drop below 80O Celsius in the lower stratosphere - At these temperatures the chemicals in the stratosphere freeze and form Polar Stratospheric Clouds (PSCS) - These increase the concentration of CFCs in turn destroyi






27. Industry 40% - Buildings 31% - Transportations 22% - Agriculture 4%






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






29. O The amount of energy moving in the form of photons or other elementary particles at a certain distance from the source per unit of area per second. Area/second






30. Sea ice extent in Antarctica is rapidly reducing. Seasonal variability. People - Animals and Ice






31. Greenhouse gases are a ___ portion of the atmosphere






32. Sea ice - Continental ice sheets - Permafrost (frozen soil) - Mountain glaciers - Snow cover






33. The high pressure decreases the melting point and favors melting - Melt water being less dense rises along the water column along the ice shelf bottom and may either escape the cavity or refreeze at some intermediate depth. Melting point decreases:






34. Carbon dioxide - Methane - Ozone - Water Vapor - Few others - Most ___________________ are mixed in the troposphere (Except water vapor) - Water vapor is concentrated closer to the ground.






35. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2






36. Arctic warms faster than other parts of the globe in response to a given increase in greenhouse gasses - More direct route to warming - In the Arctic a greater fraction of any increase in radiation absorbed by the surface goes directly into warming t






37. The warmer the temperature - the deeper the active layer - thaws and refreezes every year - Permafrost below freezing for two or more years.






38. Amount of light absorbed by atmosphere






39. Ice flowing from the middle of Greenland to the edges and melting. 90 feet a day- speed that ice is moving.






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






41. 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






42. 240 w/m squared






43. Land Based Ecosystems retain ____ CO2.






44. Same as heating an apartment v home - Thinner atmosphere than tropics; warms faster.






45. Wet gets _____ - dry gets ____ - Wet - 50ON (sub polar) Canada - N Europe - Russia - Tropical area- monsoon (rainforest) - Drier - Subtropics - Australia - S. Africa - Mediterranean - Caribbean - Mexico - SW US






46. In troposphere = greenhouse warming gas - However - most of it is in the stratosphere.






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






48. Grace - Tells us how much mass change we have - M - This is the measure of gravity (gives us the mass) - Directly measure mass change - Poor resolution






49. A process whereby slabs of ice at the glacier margin mechanically fracture and detach from the main ice mass -






50. Under higher pressure the melting point decreases ____ - The pressure comes from the weight of the ice shelf.