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Tides. Pages 32-33 in textbook. Tides, p. 11 in packet…. Tides Water on the shores rises for about 6 hours until ‘high tide’, then falls for about 6 hours until ‘low tide’. Gravity! Complete the boxes in the diagram in your notes; See next slide or p. 33 in book (Figure 10) for information!.

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Tides

Tides

Pages 32-33 in textbook


Tides p 11 in packet
Tides, p. 11 in packet…

  • Tides

  • Water on the shores rises for about 6 hours until ‘high tide’, then falls for about 6 hours until ‘low tide’.

  • Gravity!

    Complete the boxes in the diagram in your notes; See next slide or p. 33 in book (Figure 10) for information!


Tides1

Tides occur mainly due to the difference in the force of gravity between the moon and different parts of Earth. http://www.wiley.com/college/strahler/0471480533/animations/ch19_animations/animation3.html ; http://www.onr.navy.mil/focus/ocean/motion/tides1.htm

Tides


Tides p 11 in packet1
Tides, p. 11 in packet… gravity between the moon and different parts of Earth.

  • Differences in the moon’s pull (gravity) on different parts of the Earth (water and land).

    **High tide – water closes to the moon is pulled toward the moon, and water farthest away from the moon is ‘left behind’ as the Earth is pulled.

    **Low tide – occurs between areas of high tide.


Spring and neap tides

When Earth, the sun, and the moon are in a straight line, a spring tide occurs. When the moon is at a right angle to the sun, a neap tide occurs.

Spring and Neap Tides

Full and New moons

Site 1: http://oceanservice.noaa.gov/education/kits/tides/media/supp_tide06a.html

Site 2: http://www.valdosta.edu/~cbarnbau/astro_demos/tides/neap_sp.html

First and Third quarter


Phases eclipses and tides p 15
Phases, Eclipses, and Tides, spring tide occurs. When the moon is at a right angle to the sun, a neap tide occurs.p. 15

  • A – New, B – Waxing Crescent, C – First quarter, D – Full, E – Waning Gibbous, F – Third quarter.

  • A and D – Spring Tide; C and F – Neap Tide

  • Neap

  • Eclipse

  • Penumbra

  • Tides

  • Umbra

  • Phase

  • Spring

  • Lunar (during a Full moon!!)

  • Solar (during a New moon!!)

  • Gravity


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