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






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






3. Greenhouse gases are a ___ portion of the atmosphere






4. Where do greenhouse gases warm up the Earth?






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






6. When inversion breaks up _______________. - Consequently - anything that breaks inversions or makes them form less often could produce major ground level warming.






7. Ice sheets have a very ____ Albedo






8. 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.






9. Forms in a mosaic of favoured locations.






10. Extent will increase the warming because less energy will be reflected back to the atmosphere by the ice and more will be absorbed by the ocean.






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






12. Slow steady decline of about 4% per decade in the total volume of Earth's stratospheric ozone.






13. More common






14. LW - SW - 55% absorbed by surface






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






16. Low clouds are a ____ feedback; they will reflect more sunlight. Clouds reflect shortwave radiation but also absorb longwave radiation






17. 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:






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






19. ~15% of incident solar energy (albedo 85)






20. Soil at or below the freezing point of water for two or more years - Can be: Terrestrial - Subsea - Can be: Continuous: exists across a landscape as an unbroken layer. More than 90% is frozen - Discontinuous






21. 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






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






23. 10 : 1 - grounding ; surface






24. 85%






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






26. Troposphere - Stratosphere (Ozone Layer) - Mesosphere - Ionosphere






27. Climate models suggest once the sea ice cover is thinned sufficiently - a strong kick from natural variability could initiate a rapid slide towards ice-free conditions in the summer.






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






29. If the Earth is warmer - are we going to have the Hadley cell stronger or weaker? Hotter = heat rises which increases the circulation.






30. Sea ice - Glaciers and Ice sheets - Alaska- ice glaciers - Greenland- ice sheets






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






32. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2






33. Positive Albedo Feedback - increase in temperature melts ice and snow reduces albedo increases temperature melts ice and snow reduces albedo... ETC






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






35. How much is the planet really warming?






36. Ocean retains ____ CO2






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






38. The difference between the incoming radiation energy and the outgoing radiation energy - A measure of the net energy.






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






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

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41. Melting Point decreases






42. 1.4 USA - 57 m total sea level equivalent






43. Where does the ozone protect us?






44. 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






45. Radiation that comes from the Sun - Visible light - 'near infrared' - ultraviolet radiation.






46. Permafrost- A frozen soil






47. A naturally or artificially caused decrease in the thickness and/or areal extent of permafrost - It is caused by the deepening fo the active layer and the thawing of the adjacent permafrost.






48. Changes over time in the highest and lowest single temperature observed during a given month of the year.






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






50. Warming- positive feedback - Cooling- negative feedback.







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