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






2. Thawing permafrost weakens coastal lands. Risk of flooding in coastal wetlands. Pollution and toxins locked in the snow and ice will be released.






3. 1.4 USA - 57 m total sea level equivalent






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

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






6. Greenhouse gases are a ___ portion of the atmosphere






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






8. Ozone layer in high stratosphere (25-40 km altitude) absorbs about 95-99% of ultraviolet radiation.






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






10. Atmosphere retains ____ CO2






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






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






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






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






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






16. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






17. ~15% of incident solar energy (albedo 85)






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






19. Descending Air dry - Convection cells are wet.






20. 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






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






22. ~10% of incident solar energy (albedo 90)






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






24. The last portion of a glacier grounded to bedrock - after this line there are ice shelves.






25. 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






26. The major distinction between the Protocol and the Convention is that while the Convention encouraged industrialized countries to stabilize GHG emissions - the Protocol commits them to do so.






27. Is defined usually on the basis of the degree of dryness (in comparison to some 'normal' or average amount






28. 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






29. 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.






30. Set up in 1988 by WMO and UNEP.






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






32. 85%






33. High vs low






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






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






36. US is responsible for ___ of the total CO2






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






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






39. The last portion of a glacier grounded to bedrock - after this line there are ice shelves.






40. Unfrozen ground that is found within a mass of permafrost






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






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






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






44. 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.






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






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






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






48. Measures input and output.






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






50. 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