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






2. Where does the ozone protect us?






3. 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.






4. 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.






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






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






7. 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






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






9. 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%






10. Descending Air dry - Convection cells are wet.






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






12. 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






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






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






15. 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.






16. Antarctica - stratosphere - Sep-Oct






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






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






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






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






21. 20% human produced CO2 emissions. Tropical forests hold around 50% of the carbon present in vegetation on Earth.






22. Top layer of soil that thaws during the summer and freezes again during autumn. - Between 1 and 3 m thick.






23. Measures input and output.






24. Land Based Ecosystems retain ____ CO2.






25. 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:






26. LW - SW - 55% absorbed by surface






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






28. 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






29. 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.






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






31. Volcanic eruptions - Sunspots - Wobbly Earth






32. ~15% of incident solar energy (albedo 85)






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






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






35. Permafrost- A frozen soil






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






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






38. ~10% of incident solar energy (albedo 90)






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






40. Less frequent and weaker






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






42. 1.4 USA - 57 m total sea level equivalent






43. The air can hold less water vapor - Consequently - less water can be evaporated in the air - and only a small portion of energy is used in this process - Most of the energy that reaches the Arctic goes directly into warming the air






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






45. Betts et al found that: if CO-2 __________ this has a physiological effect on plant transpiration increased simulated runoff by 6% b. How? i. More CO2 1. Plants pores open less 2. This reduces transpiration 3. More water in the land surface






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






47. 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






48. 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






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






50. Pollution: heat and sunlight cook the air and the chemical compounds which are in it. This combines with the nitrogen oxide and creates 'smog'. This makes breathing difficult for those with respiratory ailments.