Phases eclipses and tides
Download
1 / 13

Phases, Eclipses and Tides - PowerPoint PPT Presentation


  • 317 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Phases, Eclipses and Tides' - xiang


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript


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.)



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



ad