Test your basic knowledge |

Global Warming

Subjects : literacy, science
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Like weighing oneself on the scale.

2. Peru and Ecuador to the equatorial central pacific - Causes irregular warming in sea surface

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

4. 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.

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

6. 78% nitrogen - 28% oxygen - Greenhouse gases: Have a more complex molecular structure and can absorb and re:radiate heat in all directions.

7. Atmosphere retains ____ CO2

8. 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.

9. Surface Mass Balance is of the order of _____ melting is ____ times more.

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

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

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

13. Forms in a mosaic of favoured locations.

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

15. 23 -45 degrees. The Larger the tilt the larger the variability of the seasons.

16. 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%

17. Radiation absorbed by atmospheric greenhouse gases?

18. Massive cooldown has allowed colder conditions to persist leading to cfcs stabilizing leading to ozone depletion. Later - more warming will lead to more moisture in the air which will lead to more snowfall!

19. 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

20. ~15% of incident solar energy (albedo 85)

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

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

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

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

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

26. x7 smaller - 7m total sea level equivalent.

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

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

29. An area of unfrozen ground that is open to the ground surface but otherwise enclosed in permafrost.

30. Grace - Tells us how much mass change we have - M - This is the measure of gravity (gives us the mass) - Directly measure mass change - Poor resolution

31. 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.

32. 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

33. Total absorbed solar radiation

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

35. he increase of ozone concentration in the atmosphere helps ____ our planet

36. The difference between the incoming radiation energy and the outgoing radiation energy - A measure of the net energy.

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

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

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

40. O Climate change in the Arctic is occurring now - Changes have been huge already

41. Land Based Ecosystems retain ____ CO2.

42. Set up in 1988 by WMO and UNEP.

43. 85%

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

45. SMB- mass balance due to processes that affect the surface of the ice sheet. Precipitation- evapotranspiration-runoff-blowing snow etc.

46. The large-scale ocean circulation that moves water between the deep and surface ocean which effects salinity and temperature change - Supplies heat to the polar-regions.

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

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

49. If the mean annual air temperature is only slightly below 0 degrees C - permafrost will form only in spots that are sheltered.

50. Greenhouse gases are a ___ portion of the atmosphere