8.9 - Global warming

• What is the atmosphere?

  The atmosphere is a layer of gases surrounding the Earth that is held in place by gravity.
• Name three greenhouse gases

  Water vapour, carbon dioxide and methane
• True or false? Until now, the earth's atmosphere has always been the same temperature.

  FALSE - The earth's temperature has always fluctuated. What is different this time is that it is unnatural and happening very fast.
• Global warming

  A gradual increase in average global temperature
• Climate change

  The effects that global warming has on the climate, such as large scale shifts in weather patterns
• Climate

  long term weather patterns
• Give three examples of climate change and how they are different to current weather patterns.

  -Droughts

  - Floods

  - Hurricanes

  Different because they are becoming more severe and common
• Why are the sea levels rising? Give 2 reasons

  1. Higher temperature causes more ice to melt

  2. Because the water is at a higher temperature its volume increases
• What are the effects of sea levels rising?

  - more seasonal flooding globally

  - Submersion of entire islands/costal towns
• Weather

  the short-term state of the atmosphere, including temperature, humidity, precipitation, wind, and visibility