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Unit 4: The Earth-M
| 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's tilt relative to the sun and earth's position in it's 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 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 moon |
| 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 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 | The 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, ay 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:
Alvarez Amy