How Do Earth And Its Moon Move?
Relative size is when items that are closer appear larger than those that are farther away. An example of this is the way the moon appears to be the same size as the sun even though the sun is much larger!
The moon is a satellite (Fr. satellite) of the Earth. A satellite is an object that moves around another object in space.
An orbit (Fr. orbite) is certain path a planet or moon takes (this path will take approximately the same length of time for each complete revolution). An orbit of the moon lasts about 28 days. This is why the moon has phases.
Phases (Fr. stade) are the different shapes of the moon as seen from the Earth. The moon does not create its own light. It reflects light from the sun back to the Earth. As the moon moves around the Earth, the light reflects back to us in different phases which is why it looks different each night.
Revolution (Fr. revolution complet) is the movement of the Earth around the sun. It takes approximately 365 days. As the Earth revolves around the sun it also rotates on its axis. An axis (Fr. axe) is an imaginary line that runs through the center of the Earth - from the North Pole to the South Pole. The Earth moves (rotates) on this axis. It is known as a Rotation (Fr. rotation). The Earth rotates every 24 hours. Rotation is also responsible for causing the day and night.