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| Question | Answer |
|---|---|
| rotation | The spin of a body on its axis |
| day | The time required for Earth to rotate once on its axis |
| revolution | The motion of a body that travels around another body in space one complete trip along an orbit |
| year | The time required for the Earth to orbit once around the sun |
| season | A division of the year that is characterized by recurring weather conditions and determined by both Earth tilt relative to the sun and Earth postion in its orbit around the sun |
| equinox | The moment when the sun appears to cross the celestial equator |
| solstice | The point at which the sun is as far north or as far south of the equator as possible |
| satellite | A natural or artficial body that revolves around a planet |
| gravity | A forces attraction between objects that is due to their masses |
| lunar phases | The different appears of the moon from Earth throughout the month |
| eclipse | An event in which the shadow of one celestial body falls on another |
| umbra | A shadow thats blocks sunlight such as the conical section in the shadow of the earth or the moon |
| penumbra | The outer part of a shadow such as the shadow cast by earth or the moon in which sunlight is only partially blocked |
| tide | The periodoc rise and my fall of the water level in the oceans and other large body of water |
| tidal range | The different in levels of ocean water at high tide and low tide |
| spring tide | A tide increased range occurs two times a month at the new moon and full moons |
| neap tide | A tide minimum range that ocuurs during the first and the third quater moons |