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






3. 1. They are the largest contributor to sea level rise 2. Can affect the thermohaline circulation (mainly in Greenland) 3. Are directly connected to climate change






4. Help darkens the snow and ice surface - increasing the amount of energy that is absorbed.






5. 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.






6. Ice sheets have a very ____ Albedo






7. Radiation absorbed by atmospheric greenhouse gases?






8. Number of days that exceed a given temperature






9. Warming- positive feedback - Cooling- negative feedback.






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






11. Permafrost- A frozen soil






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






13. Top layer of soil that thaws during the summer and freezes again during autumn. - Between 1 and 3 m thick.






14. 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.






15. Set up in 1988 by WMO and UNEP.






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

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17. Concentration of 380 ppmv - Have risen about 40% - Preindustrial~ 270~280 ppmv






18. Holds unique and key information - Are highly interconnected - Respond and drive climate change - Are the largest freshwater reservoirs of the planet - Ice cores tell us that in climate records - nothing is regular and ice sheet plays major role.






19. Greenhouse gases are a ___ portion of the atmosphere






20. When meltwater seeps through a flowing glacier - it can lubricate the base and hasten the glacier's seaward flow.






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

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22. Poor resolution (200-400 km) does not allow us to distinguish glaciers and basins.






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






24. Melting Point decreases






25. Tundra absorbs more energy than ice and snow but less than scrubs and forest - and with those plants migrating towards the north - they will further contribute ot absorb more energy.






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






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






28. Betts et al found that: if CO-2 __________ this has a physiological effect on plant transpiration increased simulated runoff by 6% b. How? i. More CO2 1. Plants pores open less 2. This reduces transpiration 3. More water in the land surface






29. Industrial product - 300 ppb (parts per billion)






30. 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.






31. Fresh snow and snow-covered sea ice may have an albedo higher than 80% - even when melting in the summer. Sea ice has a higher albedo and can absorb as little as 10% of the solar energy. On average - sea ice albedo is around 85%






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






33. A mass of land ice - continental or sub-continental in extent - and thick enough to cover most of the underlying bedrock topography - If you have a warm ocean - it will melt the ice sheet. Its shape is mainly determined by the dynamics of its outward






34. Some parts of the planet are dry because of their location: most of the deserts are around 30 N and 30 S - where sinking air predominates






35. 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






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






37. InSAR - +snow/-ice loss - ice dynamics - requires a lot of data.






38. 1. We live in troposphere. Greenhouse gases here warm up the Earth 2. Above stratosphere. The ozone in this layer protects us.






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






40. Over the Northern Hemisphere than the tropics.






41. 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:






42. A thick - floating slab of freshwater ice extending from coast to coast.






43. The amount of light reflected by an object.






44. 10 : 1 - grounding ; surface






45. All processes that add snow or ice to a glacier or to flowing ice or snow cover.






46. Cooler water and drought conditions.






47. 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






48. Is unfrozen ground that is exposed to the ground surface and to a larger mass of unfrozen ground beneath it.






49. Sea ice and continental ice. This is caused by Atmospheric warming triggers.






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







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