earth’s natural satellite – the moon
DESCRIPTION
Earth’s Natural satellite – the moon. Origin. Several theories Gravity, same formation material, Earth’s residual material Most popular – impact/collision theory ** billions of years ago a major impact between Earth and a object the size of Mars. https://www.youtube.com/watch?v=ibV4MdN5wo0. - PowerPoint PPT PresentationTRANSCRIPT
Origin
Several theories Gravity, same formation material,
Earth’s residual material Most popular – impact/collision theory** billions of years ago a major impact
between Earth and a object the size of Mars
Structure of the Moon
Similar layers to Earth Crust, mantle (molten), and core
(solid iron)
Moonquakes Slight magnetic field
Why does the moon change phases? the light we see is the reflection of
the sun on the moon’s surface
the phases are determined by the positions of the earth, moon and sun
AND the amount of the sunlit side that is
facing you on earth
partial – penumbra total - umbra
Challenge! What part of the sun is seen during
a partial solar eclipse?
Tides
gravitational attraction occurs for all matter (in any state)
although the sun has the most influence on earth (considering its superior mass), the moon also affects the gravitational pull
the water on earth is pulled towards the moon and bulges at the closest and opposite points on the planet
creating two high and two low tides in one rotational period (about 24 hours)
Why is neap tide not as drastic as spring tide? Neap – first and last Quarter Spring – new and full moon
The Dark Side of the Moon – more like, the Other Side of the Moon the moon’s rotation and revolution
are the same – about 27.3 earth days we always see the same side of the
moon no matter what the phase or the season
http://www.youtube.com/watch?v=AQRNzepe4wI
http://www.youtube.com/watch?v=nXseTWTZlks