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






2. How often does El Nio occur?






3. O Unfrozen soil that stays within the permafrost.






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






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






6. Number of days that exceed a given temperature






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






8. Ice sheets have a very ____ Albedo






9. Volcanic eruptions - Sunspots - Wobbly Earth






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






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






12. 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.






13. Over the past century what has happened to the Earth's temperature?






14. Concentration of 380 ppmv - Have risen about 40% - Preindustrial~ 270~280 ppmv






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






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






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






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






19. High vs low






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






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






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






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






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






25. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






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






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






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






29. Summer increase in cloud cover - Winter decrease in cloud cover.

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30. South polar vortex - Temperatures drop below 80O Celsius in the lower stratosphere - At these temperatures the chemicals in the stratosphere freeze and form Polar Stratospheric Clouds (PSCS) - These increase the concentration of CFCs in turn destroyi






31. Land Based Ecosystems retain ____ CO2.






32. More common






33. Like weighing oneself on the scale.






34. 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.






35. LW - SW - 55% absorbed by surface






36. Total absorbed solar radiation






37. 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:






38. 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






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






40. Water vapor - 36-70% - carbon dioxide - 9-26% - methane - 4-9% - ozone - 3-7%






41. 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.






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






43. 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






44. Over the Northern Hemisphere than the tropics.






45. 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.






46. Sea ice and continental ice. This is caused by Atmospheric warming triggers.






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






48. The order of 1 m/year. Melting is ten times more.






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






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