Sea floor spreading

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This is a summarising activity using a sea-floor spreading reading. Reading not included

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  • New words can be words that are completely new to you or those that are used in a different way than you are used to. Eg some words have a specific meaning in science which is different from the way they are used in daily language.
  • Sea floor spreading

    1. 1. Sea-floorspreading<br />A summarisingactivity<br />
    2. 2. First, the reading<br />Read through once to get the overall picture of what the article is about<br />Pause every now and then to check that you understand<br />Be sure to look at pictures and captions and understand how they relate to the text<br />Use a code system: eg “def” for definitions, “fact” for facts, “A” for scientific arguments, “C” for cause and effect statements, etc<br />
    3. 3. Summarising<br />pull out main ideas <br />focus on key details <br />use key words and phrases <br />break down the larger ideas <br />write only enough to convey the gist <br />take succinct but complete notes <br />
    4. 4. How do you do it<br />Who, what, where, when and how????<br />Take out material that is not important to your understanding.<br />Take out anything that is repeated.<br />Replace lists of things with a word that describes the list (e.g., use fish for rainbow trout, salmon, and halibut).<br />Select a topic sentence or invent one if it is missing.<br />Note any new words and their meanings.<br />
    5. 5. 5<br />The word photography comes from the Greek word meaning “drawing with light”….Light is the most essential ingredient in photography. Nearly all forms of photography are based on the fact that certain chemicals are photosensitive- that is, they change in some way when exposed to light. Photosensitive materials abound in nature; plants that close their blooms at night are one example. The films used in photography depend on a limited number of chemical compounds that darken when exposed to light. The compounds most widely used today are called halogens (usually bromine, chlorine, or iodine).<br /> Microsoft Encarta Encyclopedia<br />
    6. 6. 6<br />Photo = light<br />Graph = drawing<br />def<br />The word photography comes from the Greek word meaning “drawing with light”….Light is the most essential ingredient in photography. Nearly all forms of photography are based on the fact that certain chemicals are photosensitive- that is, they change in some way when exposed to light. Photosensitive materials abound in nature; plants that close their blooms at night are one example. The films used in photography depend on a limited number of chemical compounds that darken when exposed to light. The compounds most widely used today are called halogens (usually bromine, chlorine, or iodine.<br /> Microsoft Encarta Encyclopedia<br />def<br />Photo = light<br />sensitive<br />
    7. 7. So, we end up with:<br />Photography = “drawing with light”<br />Light is the most essential ingredient in photography. <br />Photosensitive – change in some way when exposed to light<br />Photography depends on chemical compounds that darken when exposed to light.<br />
    8. 8. Dot points are fine in a summary<br />Make sure you rewrite things in your own words wherever possible<br />
    9. 9. So, our final summary could be:<br />Photography depends on light to darken photosensitive chemicals in the film.<br />
    10. 10. A summaryis:<br /><ul><li>An essential condensation in your own words.
    11. 11. Answers the question “what is the author really saying?”
    12. 12. Is the result of careful “listening” to the author.
    13. 13. Remains faithful to the author’s emphasis and interpretation.
    14. 14. Does not disagree with or critique the author’s opinion.</li></li></ul><li>Anticipation<br /><ul><li>What information do you think will be given in the article on sea floor spreading?</li></li></ul><li>
    15. 15. 3-2-1<br /><ul><li>3 Things you found out
    16. 16. 2 Things you found interesting
    17. 17. 1 Question you still have</li></li></ul><li>Questionsto answer<br />Why did Wegner not know about sea-floor spreading?<br />Which new technologies made the discovery and verification of sea-floor spreading possible<br />List, in point form, the evidence of sea-floor spreading<br />Explain how the evidence listed in Q3 supports the theory of sea-floor spreading<br />Describe how sea-floor spreading supports Wegner's theory of continental drift<br />The word paleomagnetism is made of two parts.<br />What are they?<br />What do they mean?<br />

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