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

2. 23 -45 degrees. The Larger the tilt the larger the variability of the seasons.

3. 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

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

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

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

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

8. LW - SW - 55% absorbed by surface

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

10. 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

11. More common

12. Positive Albedo Feedback - increase in temperature melts ice and snow reduces albedo increases temperature melts ice and snow reduces albedo... ETC

13. Cooler water and drought conditions.

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

15. 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.

16. What can cause a change in the Earth's climate balance?

17. Measures input and output.

18. 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

19. The buoyant force is equal to the weight of the displaced water.

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

21. 10 : 1 - grounding ; surface

22. The land-surface configuration that results from the melting of ground ice in a region where permafrost degrades is called Thermokarst.

23. Greenhouse gases are a ___ portion of the atmosphere

24. In ________- inversion layer is more common in the Arctic

25. Forms in a mosaic of favoured locations.

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

27. Atmosphere retains ____ CO2

28. 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

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

30. Most of the deserts are around 30 N and 30 S - where sinking air predominates

31. 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.

32. 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.

33. 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.

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

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

36. The depletion of stratospheric ozone layer in Antarctica in Springtime (august through October)

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

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

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

40. Ice flowing from the middle of Greenland to the edges and melting. 90 feet a day- speed that ice is moving.

41. Volcanic eruptions - Sunspots - Wobbly Earth

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

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

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

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

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

47. 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.

48. High cloud has a _____ effect and cool cloud has a ____ effect

49. ~10% of incident solar energy (albedo 90)

50. Wet gets _____ - dry gets ____ - Wet - 50ON (sub polar) Canada - N Europe - Russia - Tropical area- monsoon (rainforest) - Drier - Subtropics - Australia - S. Africa - Mediterranean - Caribbean - Mexico - SW US