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. Tundra absorbs more energy than ice and snow but less than scrubs and forest - and with those plants migrating towards the north - they will further contribute ot absorb more energy.

2. 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

3. More common

4. Greenhouse gases are mixed in the ____

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

6. The Day After Tomorrow - Circulation will slow by 10% to 50% in the next century

7. O Unfrozen soil that stays within the permafrost.

8. Rain is getting harder and the rain is lasting longer since the past couple of decades and will continue for that amount.

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

10. How often does El Nio occur?

11. 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

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

13. Arctic warms faster than other parts of the globe in response to a given increase in greenhouse gasses - More direct route to warming - In the Arctic a greater fraction of any increase in radiation absorbed by the surface goes directly into warming t

14. 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

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

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

17. Laser radar - H V - Long time series - high accuracy - Density

18. Is best viewed as a combination of...- Natural Variability - Associated with atmospheric circulation patterns - Growing Radiative Forcing - Associated with rising concentrations of atmospheric greenhouse gases - Strongly suggests a human influence.

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

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

21. Sea ice - Continental ice sheets - Permafrost (frozen soil) - Mountain glaciers - Snow cover

22. 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.

23. Water vapor means more water up in the clouds and less in the ground!

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

25. When inversion breaks up _______________. - Consequently - anything that breaks inversions or makes them form less often could produce major ground level warming.

26. LW - SW - 55% absorbed by surface

27. Due to a set of mutually reinforcing processes - climate change appears to be progressing in the arctic more quickly than in any other region on Earth.

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

29. Melting Point decreases

30. Is unfrozen ground that is exposed to the ground surface and to a larger mass of unfrozen ground beneath it.

31. Antarctica - stratosphere - Sep-Oct

32. Volcanic eruptions - Sunspots - Wobbly Earth

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

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

35. How much is the planet really warming?

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

37. Set up in 1988 by WMO and UNEP.

38. 240 w/m squared

39. Amount of light absorbed by surface

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

41. CO2 GHG forcing - H2O - dominant/major GHG

42. Reduction of snow and ice cover - Changes in atmospheric circulation.

43. Pockets of ice in the topmost permafrost caused by thawing which create an underground lake.

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

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

46. 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.

47. 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:

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

49. 2ppm of the atmosphere - less than 20% of greenhouse gases - 1/3 greenhouse gases effect of CO2

50. 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