Phases eclipses and tides
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Phases, Eclipses and Tides. Phases of the Moon. Why Do We Only See One Side of the Moon?. Synchronous Rotation- The rotation period of the moon is exactly the same as its revolution around the Earth. Solar Eclipse.

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Phases, Eclipses and Tides

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Phases eclipses and tides

Phases, Eclipses and Tides


Phases of the moon

Phases of the Moon


Why do we only see one side of the moon

Why Do We Only See One Side of the Moon?

  • Synchronous Rotation- The rotation period of the moon is exactly the same as its revolution around the Earth.


Solar eclipse

Solar Eclipse

  • A solar eclipse happens when the moon passes directly between the Earth and the sun, blocking the sunlight from Earth

  • Can only occur during a new moon phase


Parts of a shadow

Parts of a Shadow

  • Umbra- darkest part of a shadow, where light is totally blocked

  • Penumbra- lighter, outer part of shadow where light is only partially blocked

  • A solar eclipse will look different depending on your position on Earth. (Whether you are in the moon’s umbra or penumbra.)


Solar eclipse geometry

Solar Eclipse Geometry


Lunar eclipse

Lunar Eclipse

  • During a total lunar eclipse the moon moves into the darkest part of Earth’s shadow, the umbra.

  • Can only occur during a full moon phase.


Lunar eclipse geometry

Lunar Eclipse Geometry

  • Can be seen from anywhere on Earth where the moon is visible


Tides

Tides

  • Tides are caused by differences in how much the moon’s gravity pulls on different parts of Earth.

  • We experience 2 high tides and 2 low tides every 25 hours.


Special types of tides

Special Types of Tides

  • Spring Tides

    • Greatest distance between consecutive high and low tide

    • When Sun, moon and Earth are in a straight line (new moon or full moon phase)

  • Neap Tides

    • Least difference between consecutive low and high tides

    • When the Sun’s pull on the oceans is at a right angle (perpendicular) to the moon’s pull

    • During 1st and 3rd quarter phase


Special types of tides1

Special Types of Tides


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