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. SALTY WATER = MORE DENSE - Maximum density at 4OC - This is why ice melting is a big deal; if the whole circle slows down - Ice bergs are fresh water higher sea level rise.






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






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






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






5. 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.






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






7. How much is the planet really warming?






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






9. Really measures volume.






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






11. Land Based Ecosystems retain ____ CO2.






12. Descending Air dry - Convection cells are wet.






13. How often does El Nio occur?






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






15. 1.4 USA - 57 m total sea level equivalent






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






17. Just remember the general direction of the circulation - Rising northern pacific. You start in between Greenland and Europe (youngest water) - Oldest water is in the Pacific Ocean - Salty water> fresh water - Cold Water > Warm Water






18. Longwave radiation - any radiation with a long wave will heat up quickly.






19. 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.






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






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






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






23. Greenhouse gases are a ___ portion of the atmosphere






24. Ocean retains ____ CO2






25. Reduction of Summer Sea- 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 - Snow and snow covered ice absorb 15% of incident solar energy - Ice absorbs 10% of inc






26. 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






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






28. Melting Point decreases






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






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






31. Amount of light absorbed by surface






32. This is the total mass change - difference between input and outputs—snow accumulation-ablation.






33. The Earth emits this.






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






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






36. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2






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






38. LW - SW - 55% absorbed by surface






39. 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






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






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






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






43. 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.






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






45. Volcanic eruptions - Sunspots - Wobbly Earth






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






47. Radiation absorbed by atmospheric greenhouse gases?






48. 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.






49. Forms in a mosaic of favoured locations.






50. Temperature needed to melt at depth is much lower than that needed to melt at the surface.