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






2. The transition of a substance from the solid phase directly to the vapor phase - or vice versa - without passing through an intermediate liquid phase.






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






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






5. 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:






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






7. 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






8. Long time series started in the '70s and yielding good data in the '90s - Detects elevation with high accuracy: 10 cm precision (laser) to 1 m (radar) - 2/3 Gravity Surveys (GRACE) - Weighing the total mass every 30 days - Direct monthly estimate






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






10. On a clear cold day - the thin layer of air hugging the ground is called inversion. This layer is much cooler than the air a few hundred meters above it.






11. 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.






12. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






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






14. 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.






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






16. 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






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






18. Ocean retains ____ CO2






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. Number of days that exceed a given temperature






21. Over the Northern Hemisphere than the tropics.






22. Melting Point decreases






23. 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






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






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






26. 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.






27. Where do greenhouse gases warm up the Earth?






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






29. Taliks are found under lakes because of the ability of water to store and vertically transfer heat energy - Vertical extent of the taliks found under lakes is related to the depth and volume of the overlying water body.






30. ~15% of incident solar energy (albedo 85)






31. Prolonged period of excessively hot weather - Which may be accompanied by high humidity.






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






33. Set up in 1988 by WMO and UNEP.






34. 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.






35. Ice sheets have a very ____ Albedo






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






37. 1.4 USA - 57 m total sea level equivalent






38. Atmosphere retains ____ CO2






39. Amount of light absorbed by surface






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






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






42. Occurs when there is not enough water available for a particular crop to grow at a particular time.Typically seen after!meteorological drought (when rainfall decreases) but before a hydrological drought






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






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






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






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






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






48. 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.






49. 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






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