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# 10/4/11 and 10/5/11

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### 10/4/11 and 10/5/11

1. 1. 10/4/11 B DayLEQ: How do chemical and mechanical weathering create unconformities in the earth?<br />1. What is one thing we can learn from ice rings? <br />2. What are two things that we can learn from ice cores?<br />3. Is our climate getting warmer or colder? What do greenhouse gases have to do with it?!<br />4. Copy and complete the following sentence:<br />Increased levels of carbon dioxide cause the global temperature to (increase/decrease).<br />
2. 2. Today’s LEQ: How do chemical and mechanical weathering create unconformities in the earth?<br />By the end of today, you should be able to…<br />Compare and contrast chemical and mechanical weathering<br />2. Explain how chemical and mechanical weathering can create unconformities in the earth<br />
3. 3. Track your Progress: Unit 1 Quiz B<br />-1 = 95 -9 = 55 -17 = 15<br />-2 = 90 -10 = 50 -18 = 10<br />-3 = 85 -11 = 45 -19 = 5<br />-4 = 80 -12 = 40 <br />-5 = 75 -13 = 35<br />-6 = 70 -14 = 30<br />-7 = 65 -15 = 25<br />-8 = 60 -16 = 20<br />
4. 4. EOG Question From Last Year’s Test:<br />A scientist has a hypothesis that a large volcanic eruption caused a change in global temperature. Which information gained from ice cores is most useful in supporting the scientist’s hypothesis?<br />A. levels of dissolved oxygen <br />B. identities of trace metals <br />C. estimates of natural radioactivity <br />D. amounts of atmospheric dust<br />
5. 5. Draw this in your notes:<br />Evidence for climate change:<br />Ice Cores<br />Tree Rings<br />
6. 6. Ice Cores: samples of ice that tell about the AIR in Earth’s atmosphere over time<br />Example:<br />
7. 7.
8. 8. Ice Cores: samples of ice that tell about the AIR in Earth’s atmosphere over time<br />Example:<br />Carbon Dioxide in atmosphere<br />
9. 9. The Greenhouse Effect<br />How does it feel when you get into a car after it’s been sitting in the hot summer sun all day? Why do you think it feels that way?<br />The Greenhouse Effect works the same way!<br />Greenhouse Brainpop<br />
10. 10. Let’s take a closer look…<br />
11. 11. High CO2 = Warmer Temps<br />Greenhouse Effect: certain gases, such as CO2, in Earth’s atmosphere trap energy from the sun and warm up Earth<br />
12. 12. HOT Q: <br />You take an ice core from Antarctica and you find significantly more carbon dioxide bubbles in the layers of ice that are closer to the top.<br />What can you infer about the climate?<br />
13. 13. 1000 years of CO2 and Global Warming<br />
14. 14. Ice Cores: samples of ice that tell about the AIR in Earth’s atmosphere over time<br />Example:<br />Carbon Dioxide in atmosphere<br />Pollution<br />
15. 15. THE YEAR THAT CONGRESS PASSED THE CLEAN AIR ACT<br />
16. 16. Ice Cores: samples of ice that tell about the AIR in Earth’s atmosphere over time<br />Example:<br />Carbon Dioxide in atmosphere<br />Pollution<br />Volcanic Ash<br />
17. 17. HOT Q: The Earth gets COLDER after big volcanic eruptions!<br />WHY?<br />
18. 18. These things block the sun from reaching earth!<br />
19. 19. Why does the Earth get colder after big volcanic eruptions?<br />24<br />Dust, ash glass, and rock are released into the air during a volcanic eruption.<br />http://www.youtube.com/watch?v=fmsxmbVYMHo&NR=1<br />
20. 20. Clouds of ash can cover entire continents!<br />
21. 21. EOG Question From Last Year’s Test:<br />A scientist has a hypothesis that a large volcanic eruption caused a change in global temperature. Which information gained from ice cores is most useful in supporting the scientist’s hypothesis?<br />A. levels of dissolved oxygen <br />B. identities of trace metals <br />C. estimates of natural radioactivity <br />D. amounts of atmospheric dust<br />
22. 22. Ice Cores and Climate Change!<br />Ice in Greenland and Antarctica can be deeper than the height of skyscrapers and up to 530,000 years old!<br />
23. 23. Tree Rings: tell the amount of rain and precipitation over time.<br />Example:<br />1 Ring = 1 year<br />THICK = MORE RAIN<br />THIN = LESS RAIN<br />
24. 24. SUMMARIZER: How do rocks, fossils, and ice cores help us paint a picture of Earth’s history?(3-5 sentences please!)<br />Your answer MUST INCLUDE the following vocabulary:<br />TREE RINGS<br />ICE CORES<br />INDEX FOSSILS<br />LAW OF SUPERPOSITION<br />
25. 25. FOCUS VOCABULARY<br />27. Chemical Weathering<br />28. Mechanical Weathering<br />29. Erosion<br />30. Unconformity<br />
26. 26. SMARTIE SCIENCE<br />
27. 27. Mechanical Weathering<br />Chemical Weathering<br />
28. 28. MECHANICAL WEATHERING:<br /><ul><li>Physical changes to rock </li></ul>(rocks break into smaller pieces)<br /><ul><li>Example:</li></li></ul><li>Mountains get worn down to become pebbles!<br />
29. 29. EXAMPLE:<br />ICE breaks rocks apart!!<br />
30. 30.
31. 31. MECHANICAL WEATHERING:<br /><ul><li>Physical changes to rock </li></ul>(rocks break into smaller pieces)<br /><ul><li>Example: ice, salt, wind, and water break down rocks</li></li></ul><li>CHEMICAL WEATHERING:<br /><ul><li>Chemicals break down rock by chemically changing the rock
32. 32. Usually indicated by color change!
33. 33. Example:</li></li></ul><li>
34. 34. COLOR CHANGE CAUSED BY ACID RAIN<br />
35. 35. CHEMICAL WEATHERING:<br /><ul><li>Chemicals break down rock by chemically changing the rock
36. 36. Usually indicated by color change!
37. 37. Example: Acid Rain, rust</li></li></ul><li>HOT Q: WHAT DO THEY HAVE IN COMMON?!<br /><ul><li>Break or wear down rock</li></li></ul><li>Chemical or Mechanical?<br />
38. 38. Chemical or Mechanical?<br />
39. 39. Chemical or Mechanical?<br />
40. 40. Discovery Streaming Clip<br />http://www.youtube.com/watch?v=lvKkPFoRiaw (breaker and woosh) <br />
41. 41. GALLERY WALK<br />
42. 42. Write Time! (In your notebook, write at least 3 complete sentences)<br /><ul><li>How was the activating strategy similar to chemical and mechanical weathering?
43. 43. Which step was CHEMICAL?
44. 44. Which step was MECHANICAL?</li></li></ul><li>FRAYER DIAGRAM: UNCONFORMITY<br />DEFINITION:<br />PICTURE:<br />A missing piece in the rock record<br />UNCONFORMITY<br />EFFECTS:<br />CAUSES:<br />
45. 45.
46. 46. PICTURE: (draw in Frayer diagram)<br />UNCONFORMITY<br />
47. 47. How Unconformities are formed…<br />http://www.classzone.com/books/earth_science/terc/content/visualizations/es2902/es2902page01.cfm?chapter_no=visualization<br />
48. 48. FRAYER DIAGRAM: UNCONFORMITY<br />DEFINITION:<br />PICTURE:<br />A missing piece in the rock record<br />UNCONFORMITY<br />EFFECTS:<br />CAUSES:<br />-WEATHERING (breaks rocks down)<br />-EROSION (carries rocks away!)<br />Incomplete information about the past!<br />
49. 49. HOT Q’s!<br />1. How does weathering contribute to unconformities?<br />2. How do unconformities change scientists’ understanding of Earth’s history?<br />
50. 50. SUMMARIZER<br />What is the difference between chemical and mechanical weathering?<br />How does weathering create gaps in our knowledge about earth’s history?<br />How is an unconformity created?<br />
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