moon phases, seasons and tides
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28 terms
Terms | Definitions |
|---|---|
 Lunar cycle | The orbit of the moon around the Earth during which all of the lunar phases occur |
| Waxing | as the moon changes from a new moon to a full moon, the sunlit part that can be seen from earth grows larger; the left side of the moon is lit |
| Waning | as the moon returns to a new moon, the sunlit part can be seen from earth grow smaller, the right side of the moon is lit |
| Crescent | when less than half the moon is lit |
| Gibbous | when more than half the moon is lit |
| Quarter | whe half the moon is lit |
| New | the phase in the lunar cycle when the moon is between the Sun and the Earth; none of the sunlit part of the moon can be seen from earth |
| Full | the phase in the lunar cycle when the moon is when the earth is between the Sun and the moon; all of the sunlit part of the moon can be seen from the earth |
| Revoulution | the elliptical motion of a body as it orbits another body in space |
| Rotation | the spinning motion of a body on its axis |
| Axis | the imaginary line, extending from the North Pole to the South Pole, going through the center of Earth's rotation |
| Orbit | the elliptical path a body takes as it travels around another body in space; the motion itself |
| Seasons | weather changes due to the varied amounts of sunlight (both intensity and number of daylight hours received); caused by Earth's tilt during revoultion |
| Tides | daily changes in the level of the ocean water |
| high- tide | when tide is at its greatest elevation |
| Low-tide | when the tide is at its lowest elevation |
| Hemisphere | half of a terrestrial globe, or celestial sphere |
| Equator | an imaginary line that wraps around Earth at 0 lattitude seperating the surface into two equal parts |
| Tilt | the slant of Earth's axis which is 23.5 from vertical |
| Oceann Tides | Daily changes in the level of ocean water |
| What force do the moon and Sun excert on Earth? | The moon and Sun both excert a pull of gravity on Earth. The water is 'grabbed' by the gravity on either side. |
| How does the Earth and moon move in relationships with the Sun? | The moon revolves around the Earth, while Earth is revolving around the Sun |
| What causes tides? | The moon's gravity pullsk on the ocean resulting in tides. |
| Gravitational Pull | The attraction between two objects due to the invisible force of gravity; the gravitational oull from the Moon is primarily responsible for the tides that from on Earth |
| Spring Tide | Tides with the largest daily tidal range; occurs when the Sun, Earth, and Moon line up with each other |
| What causes Spring Tides? | When the sun, moon, and earth are in line with each other the result is spring tide. |
| Neap Tides | Tides with the smallest daily tidal range; occurs when the Sun, Earth, and Moon from 90 angle |
| What causes neap tides? | When the sun, moon and Earth form a right angle the result is a neap tide. A neap tide is the lowest tide. |
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