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. Less frequent and weaker






2. 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.






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






4. Like weighing oneself on the scale.






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






6. The heat input is either driven by the 1- thermohaline circulation associated with sea ice formation. The direct influx of intermediate warmth water.






7. 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






8. The depletion of stratospheric ozone layer in Antarctica in Springtime (august through October)






9. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2






10. Much of the Arctic is overlain by snow and sea ice (land ice and sea ice) - It makes warming a much bigger deal in the Arctic






11. Rainy on yearly average. In these regions - rising air predominates.






12. 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%






13. Reduction of snow and ice cover - Changes in atmospheric circulation.






14. Ocean retains ____ CO2






15. 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.






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






17. ~10% of incident solar energy (albedo 90)






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






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






20. 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






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






22. 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






23. Same amount of H2O - Mass does not change - Density of ice < density of water - Volume of ice > volume of water






24. 240 w/m squared






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






26. How often does El Nio occur?






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






28. Nitrogen (N2 78%) and Oxygen (O2 21%) - Their linear 2 atom molecular structure






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






30. A dome shaped cover of perennial ice and snow.






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






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






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






34. 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.






35. 78% nitrogen - 28% oxygen - Greenhouse gases: Have a more complex molecular structure and can absorb and re:radiate heat in all directions.






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

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






38. The Day After Tomorrow - Circulation will slow by 10% to 50% in the next century






39. In _______ - the inversions are less frequent and weaker in the Arctic.






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






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






42. 1. Land usage changes 2. Seasonal timing 3. Rising CO2 levels may be a factor






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






44. 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






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






46. ~15% of incident solar energy (albedo 85)






47. Antarctica - stratosphere - Sep-Oct






48. 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.






49. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






50. Forms from frozen ocean water - Floats on the ocean surface - Grows over the winter - melts in the summer