Environmental Science, Understanding the Earth Part A

EnvironmentalScience, Understanding the Earth


  1. D

  2. A

  3. C

  4. B

  5. B

  6. B

  7. B

  8. A

  9. D

  10. A

  11. C

  12. A

  13. A

  14. C

  15. A

  16. B

  17. A

  18. B

  19. A

  20. C

  21. B

  22. D

  23. A

  24. A

  25. D

  26. B

  27. B

  28. A

  29. A

  30. C

  31. B

  32. D

  33. D

  34. A

  35. A

  36. B

  37. D

  38. B

  39. A

  40. B

Part B

  1. A condensation process forms clouds. Air that contains water vapor moves up into the atmosphere through transpiration and evaporation. It then cools below dew point to form moisture that condenses into dust particles, which then create clouds. Generally, clouds are formed when invisible water vapor condenses to form visible water droplets or when warm air blows over a cold surface.

  2. The two forces that control balloon movement are thrust and drag. Thrust force pushes the balloon in the desired direction while drag force pushes it to the opposite direction.

  3. Underground water, surface water, and atmospheric water are the three sources of water in a hydrological cycle. Surface water is the water that runs down slope along the earth surface and is collected on the ground as in rivers, lakes, streams, wetlands, or oceans.

  4. A water budget is a record that shows water input and output in a project. For example, the water balance graph that illustrates the relationship between precipitation and potential evapotranspiration in a line graph.

  5. The evidence for present climate change include melting glacial and sea ice, rising sea level, increasing humidity, increasing ocean heat content, sea surface temperature, and land temperature.

  6. The mitigation measure to slow rates of climate change include reduction of carbon emission, planting trees and expanding green spaces in urban areas, increasing motor vehicle fuel-efficiency standards, and promoting efficient water use.

  7. Holocene period, also known as Anthropocene epoch, is a geological epoch that started 11,500 years ago when glacier began to retreat.