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Question of the Day

Question of the Day. Question: What things tend to make water more dense? Less dense? Answer: … … …. Turn In: - Global Crisis Reading & Q ’ s - Lab: Properties of Seawater. El Niño. History of El Niño. 15 th Century settlers to Peru and Ecuador first wrote about El Niño

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Question of the Day

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  1. Question of the Day Question: What things tend to make water more dense? Less dense? Answer: … … … Turn In: - Global Crisis Reading & Q’s - Lab: Properties of Seawater

  2. El Niño

  3. History of El Niño • 15th Century settlers to Peruand Ecuador first wrote about El Niño • It is named after Christ, as the warm water current usually arrived in late December around Christmas

  4. History of El Niño • Coral in the Galapagos show evidence of El Niño events since the mid 1500’s • Changes in air pressure and rainfall have been recorded for over 100 years in Darwin, Australia

  5. What is El Niño? • Changes in the ocean & atmosphere in the south Pacific Ocean • Major changes to weather around the world • Also called ENSO (El Niño- Southern Oscillation)

  6. Eastern Pacific Western Pacific

  7. Normal Conditions • Winds & currents move from East to west at the equator • Warmer water accumulates in the western pacific

  8. Normal Conditions

  9. Normal Conditions • In the eastern pacific, colder water from deep in the ocean moves upward to replace the water that has moved west. • This is called • A. Uprising • B. Upwelling • C. El Niño

  10. Normal Conditions • In the eastern pacific, colder water from deep in the ocean moves upward to replace the water that has moved west. • This is called • A. Uprising • B. Upwelling • C. El Niño

  11. Normal Conditions • Upwelling • A. causes storms • B. causes boat accidents • C. makes more fish to come to the area • D. makes less fish to come to the area

  12. Normal Conditions • Upwelling • A. causes storms • B. causes boat accidents • C. makes more fish to come to the area • D. makes less fish to come to the area

  13. Summary of Normal Conditions

  14. Summary of Normal Conditions • Warm, wet weather in western Pacific (Indonesia) • Cooler, dry weather in eastern Pacific (Peru) • Upwelling causes good fishing off the coast of Peru

  15. El Niño Conditions • Winds blowing from east to west become weaker • Less water moves from east to west (sometimes moves from west to east!) • More warm water in the Eastern Pacific

  16. El Niño Conditions • More warm water in the Eastern Pacific causes • A. Less upwelling • B. Less fishing • C. Changes in weather in the Eastern and Western Pacific • D. All of the above!

  17. El Niño Conditions • More warm water in the Eastern Pacific causes • A. Less upwelling • B. Less fishing • C. Changes in weather in the Eastern and Western Pacific • D. All of the above!

  18. Worldwide Effects of El Niño • Increased rainfall in South America (Eastern Pacific) FLOODS • Less rain in Australia & Indonesia (Western Pacific) DROUGHTS, FOREST FIRES

  19. Effects of El Niño in North America • Warmer winters in Midwest, East Coast • Wetter, cooler weather in CA, Southwest • Drier weather in Washington & Oregon • Increased erosion on Pacific Coast • Fewer hurricanes in Atlantic Ocean

  20. Worldwide Effects of El Niño Dry Warmer Wet, cool Less Rain More rain

  21. El Niño & Global Warming • A natural phenomenon • Could be intensified because of global warming

  22. Video Clips: • https://www.youtube.com/watch?v=7FVZrw7bk1w • https://www.youtube.com/watch?v=MzcKBeW44ao

  23. p. 198 CYU 2, 3, 4, 5

  24. p. 198 CYU 2, 3, 4, 5 2. Propose a way to determine whether a salt water solution is unsaturated, saturated, or supersaturated. 2. Your answer here! Sample: Add a gram of salt to the solution. If it dissolves, the solution was unsaturated. If it remains solid but no solid comes out of solution, the solution was saturated. If solid comes out of the solution, the solution was supersaturated.

  25. p. 198 CYU 2, 3, 4, 5 3. Explain why chewable medication is usually faster-acting in your body than the same medication enclosed in a pill. 3. Chewing the medication increases its surface area so that it can dissolve faster. 4. Describe the steps you would take to make hot chocolate as quickly as possible using cold milk and a chocolate bar. 4. Your answer here! Sample: Warm the milk so it will melt the chocolate and stir the chocolate as it melts. 5. Determine whether your sweat would evaporate more quickly if there were 92% humidity or 37% humidity. 5. Sweat would evaporate more quickly when there is 37% humidity.

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