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The Earth’s Tides

The Earth’s Tides. Page 63. Tides -. rise and fall of water levels due to gravitational forces Occur twice a day (2 high tides, 2 low tides). What effect does the moon have on Earth?. http://home.hiwaay.net/~krcool/Astro/moon/moontides/. high tide. low tide. How are Tides created?.

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The Earth’s Tides

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  1. The Earth’s Tides Page 63

  2. Tides- rise and fall of water levels due to gravitational forces Occur twice a day (2 high tides, 2 low tides) What effect does the moon have on Earth? http://home.hiwaay.net/~krcool/Astro/moon/moontides/

  3. high tide low tide

  4. How are Tides created? • (3 ways) 1. Because the Earth and the moon are attracted to each other http://home.hiwaay.net/~krcool/Astro/moon/moontides/

  5. Moon and earth are attracted to each other by gravity

  6. Tides are also created by: • 2. the rotation of the earth, • 3. and the sun’s gravity

  7. The sun can raise the tides, too Spring Tides

  8. Tides are not waves!

  9. What are Spring tides? • Tides that produce the greatest difference between high and low tides—The biggest tides • Occur twice a month

  10. When do spring tides occur? • Once at the full moon and once at the new moon • When the sun moon and earth are nearly in a line Spring Tides combined with big storms

  11. The sun can raise the tides, too Spring Tides –the sun and the moon line up

  12. What are NEAP Tides? • Tides that produce the least difference between high and low tides—The smallest tides • Occur twice a month

  13. When do neap tides occur? • Once at the first quarter and once at the third quarter • When the sun moon and earth are at right angles to each other http://www.space.gc.ca/asc/eng/educators/resources/astronomy/multimedia/module3/tides/tides.swf

  14. The neap tides –the smallest tides –when the sun and moon are at a 90 angle

  15. What other effects do we have from the moon??

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