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Climate Change-

Climate Change- . Rules: - each person needs to contribute at least once - you must wait for 2 more people to contribute before you write again - be respectful of your peers & their opinions. http://www.youtube.com/watch?v=qEPVyrSWfQE&list=SP38EB9C0BC54A9EE2&index=1&feature=plpp_video

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Climate Change-

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  1. Climate Change-

  2. Rules: - each person needs to contribute at least once - you must wait for 2 more people to contribute before you write again- be respectful of your peers & their opinions

  3. http://www.youtube.com/watch?v=qEPVyrSWfQE&list=SP38EB9C0BC54A9EE2&index=1&feature=plpp_videohttp://www.youtube.com/watch?v=qEPVyrSWfQE&list=SP38EB9C0BC54A9EE2&index=1&feature=plpp_video • Climate Change- a long-term change in the Earth’s climate, or of a region on Earth • Global warming- the increase in Earth’s average surface temperature due to rising levels of greenhouse gas

  4. Climate change-Leading by EVIDENCE: • Sea level rise- 17 centimeters in the last century • Rising global temperature – since 1980 • Warming oceans – top 700 meters or 2,300 ft of ocean showing warming of 0.302 degrees Fahrenheit since 1969. • Shrinking ice sheets • Glacier retreats- cycles of glacial advance & retreat • Declining Artic Sea ice – VIDEO

  5. Natural cycles- Sea ice index 1979-2008 • https://www.youtube.com/watch?v=5Ogk8ZpT258&feature=related • Note the overall trend! 1-What do scientist think is causing these climate changes? 2- How much warming is from human activity/ earth’s natural cycles?

  6. HOW OLD IS OUR EARTH? • Hand Demonstration If we have only been around a few hundred years, how can we understand what are our climate was like in the past? Think, Think, Think!

  7. Key Words • Paleoclimatology- study of past climates • Proxy- imprints created during past climates; used as data to interpret past climate What are some proxies you can think of?

  8. Closer look: Foraminifera

  9. shelled microorganisms found in aquatic and marine environments • shells are made up of calcium carbonate (CaCO3) • record evidence for past environmental conditions in their shells • coiling patterns reveal past temperatures (right coil vs. left coil)

  10. Coiling Patterns Right-coiled Left-coiled Left coil= cold temperature Backwards Letter “C” • Right coil= warm temperature • Letter “C”

  11. Fun w/Forams!!! Make sure you rotate the slides so that the biggest “blob” is on top!!! Fill data into provided WS Groups of 2-3

  12. Class Discussion Time! • What may have caused this trend in temperature? What was the overall trend in our sample? • How do studying such species give evidence of past climate trends- use of proxy data as useful and valid evidence? • What other types of species or indicators exist for measuring paleoclimate?

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