Tides

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Tides
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TIDES

• What are tides?
• The periodic rise and fall of the sea level under
  the gravitational pull of the moon
• Tides are one of the most reliable phenomena in
  the world. As the sun rises in the east and the
  stars come out at night, we are confident that
  the ocean waters will regularly rise and fall
  along our shores.

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Tide

• The Moons gravity exerts a strong pull on Earth.
  
• The water bulges outward as Earth and the Moon
  revolve around a common center of mass.
• The moons gravity pulls on the earth, and pulls
  the water towards it. The water moves up into a
  slight bulge on the side of the earth that faces
  the moon.

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Spring Tides

• Spring tides occur 2 times a month, during a full
  and new moon when the Earth, Sun, and Moon are
  lined up.
• Spring tides are higher and lower than normal
  tides.
• strong tides

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Spring Tides

• Spring tides are especially strong tides (they do
  not have anything to do with the season Spring).
  They occur when the Earth, the Sun, and the Moon
  are in a line. The gravitational forces of the
  Moon and the Sun both contribute to the tides
  making them stronger.

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Neap Tides

• Neap tides occur in between spring tides, at the
  first and third quarters of the Moon when the Sun
  and Moon pull at right angles to each other.
• Neap tides are not
  as high or low as
  normal tides.
• weak tides

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Neap Tides

• When the moon and sun are at a perpendicular
  angle to one another the Moon the Suns gravity
  cancel each other out causing a weaker tide.
• They occur when the gravitational forces of the
  Moon and the Sun are perpendicular to one another
  (with respect to the Earth). Neap tides occur
  during first and third quarter moons.

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What causes tides?
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Caused by the gravitational pull of the moon sun
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During which phases of the moon do neap and
spring tides occur?
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1st 3rd Quarters
Neap?
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New or Full Moon
Spring?
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Standardized Test Preparation
Chapter 14
1. At which position would the moon be during a
neap tide? A 1 B 2 C 3 D 4
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Standardized Test Preparation
Chapter 14
2. At which position would the moon be during a
spring tide? F 1 G 2 H 3 I 4