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unit 4
| Question | Answer |
|---|---|
| absolute magnitude | A measure of how bright a star would be if it were seen from standard distance |
| day | When earth makes a full rotation on its axis |
| revolution | The motion of a body that travels around another body in space |
| year | The time required for the earth to orbit once 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 and south of the equator as possible |
| satellite | A natural or artificial body that revolves around a planet |
| gravity | A force of attraction between objects that is due to their masses |
| lunar phases | The different appearances 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 that 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 periodic rise and fall of the water level in the oceans and other large bodies of water |
| tidal range | Th e difference in levels of ocean water at high tide and low tide |
| spring tide | A tide of increased range that occurs two times a month, at the new and full moons |
| neap tide | A tide of minimum range that occurs during the first and third quarters of the moon |
Created by:
andre jr