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Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
Sec 2 - Gobal Warming
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Sec 2 - Gobal Warming

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  • 1. Global Warming
  • 2. Changes in the Earth’s Climate
  • 3.  
  • 4. What did you just witness? <ul><li>Birds migrating </li></ul><ul><li>Lighting / storm </li></ul><ul><li>Flooding </li></ul><ul><li>Hurricane </li></ul><ul><li>Snowing etc </li></ul>
  • 5. &nbsp;
  • 6. What is Global Warming? <ul><li>The increase in air temperature throughout the world. </li></ul>
  • 7. &nbsp;
  • 8. <ul><li>What can you infer from both pictures? </li></ul>
  • 9. &nbsp;
  • 10. Do you believe there is global warming?
  • 11. <ul><li>What happened? </li></ul>
  • 12. &nbsp;
  • 13. What causes the temperature to increase? <ul><li>Greenhouse effect </li></ul><ul><ul><li>The gases in the atmosphere trap some of the heat from the Sun thus keeping the Earth warm. </li></ul></ul><ul><ul><li>Without these gases, the heat would be lost and living things might not survive because it gets too cold. </li></ul></ul>
  • 14. &nbsp;
  • 15. Enhanced greenhouse effect <ul><ul><li>An accelerated greenhouse effect is caused by a rapid increase in the amount of greenhouse gases in the atmosphere, trapping more heat from the Sun. </li></ul></ul>
  • 16. What causes more greenhouse gases to enter the atmosphere? <ul><li>You might want to write it down at least three causes in your note book </li></ul><ul><li>Then we check our answer later </li></ul><ul><li>You have 1 min to do so. </li></ul>
  • 17. &nbsp;
  • 18. &nbsp;
  • 19. Types of greenhouse gases <ul><li>Carbon dioxide </li></ul>
  • 20. &nbsp;
  • 21. Types of greenhouse gases <ul><li>Nitrous oxide </li></ul>
  • 22. &nbsp;
  • 23. Types of greenhouse gases <ul><li>CFCs </li></ul><ul><ul><li>Chlorofluorocarbons </li></ul></ul>
  • 24. Types of greenhouse gases <ul><li>Methane </li></ul>
  • 25. Methane from rice field
  • 26. &nbsp;
  • 27. Landfill
  • 28. &nbsp;
  • 29. Cow belch
  • 30. Consequences of global warming
  • 31. Consequences <ul><li>Changes in weather condition </li></ul><ul><li>Impact on plants </li></ul><ul><li>Impact on animals </li></ul><ul><li>Impact on people </li></ul><ul><li>Rising sea level </li></ul>
  • 32. Changes in weather condition <ul><li>Drought </li></ul><ul><ul><li>Too dry </li></ul></ul><ul><ul><li>Water evaporate faster </li></ul></ul>
  • 33. Changes in weather condition <ul><li>Floods </li></ul><ul><ul><li>Too much water vapour in the atmosphere </li></ul></ul><ul><ul><li>Too much rainfall </li></ul></ul>
  • 34. Impact on plants <ul><li>Changes in rainfall and temperature could affect the growth of important crops. </li></ul><ul><ul><li>Rice </li></ul></ul><ul><ul><li>Wheat </li></ul></ul><ul><ul><li>Corn </li></ul></ul><ul><li>Leading to food shortage &amp; famine </li></ul>
  • 35. &nbsp;
  • 36. Impact on animals <ul><li>Migration of animals due to temperature changes </li></ul><ul><ul><li>Yaks and llamas have to move to mountainous or cooler area or else face extinction. </li></ul></ul>
  • 37. &nbsp;
  • 38. Impact on people <ul><li>Increase in temperature leading to spread of diseases such as </li></ul><ul><ul><li>Dengue fever </li></ul></ul><ul><ul><li>Malaria </li></ul></ul><ul><ul><li>Yellow fever </li></ul></ul><ul><li>Increasing temperatures may lead to dehydration and heat stroke </li></ul>
  • 39. Rising sea level <ul><li>Melting of the ice cap </li></ul><ul><li>Decrease in land area </li></ul><ul><li>Arable farmland may be destroyed </li></ul><ul><li>People have to move from coastal area to higher ground. </li></ul>
  • 40. &nbsp;
  • 41. <ul><li>Can you see the ice cap melting </li></ul><ul><li>Where does the water goes? </li></ul>
  • 42. &nbsp;
  • 43. Any solutions? What can Hillgrove do to battle against global warming?
  • 44. What can Hillgrove do to battle against global warming? <ul><li>Dateline 10 July 09 </li></ul><ul><li>Best 3 answers will win a prize </li></ul><ul><li>Put your answer in the box (Mr. Caleb Chua Pigeon hold) </li></ul><ul><li>Please write behind </li></ul><ul><ul><li>Your name </li></ul></ul><ul><ul><li>Your class </li></ul></ul>
  • 45. &nbsp;
  • 46. &nbsp;
  • 47. &nbsp;
  • 48. &nbsp;
  • 49. &nbsp;
  • 50. &nbsp;
  • 51. Homework <ul><li>Sec 2 Exp </li></ul><ul><ul><li>Workbook pg 105 to 106 </li></ul></ul><ul><li>Sec 2 NA </li></ul><ul><ul><li>Work pg 117 to 118 </li></ul></ul>
  • 52. &nbsp;

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