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Earth, Sun, Moon
| Question | Answer |
|---|---|
| Rotation | Spinning of earth on its axis |
| Revolution | Movement of the earth around the sun |
| Axis | An imaginary line that goes through the poles |
| Equator | An imaginary line that runs across the middle of the earth |
| Tilt | the slant of the earth on its axis |
| Hemisphere | an imaginary line that divides the earth into halves |
| lunar cycle | appearance of phases of the moon as viewed from earth |
| waxing | when the moon is getting bigger starting from the right side |
| crescent moon | the phase right after or before a new moon |
| solar eclipse | when the moon passes between the sun and earth |
| gibbous moon | when more than half of the moon is lighted |
| full moon | when the whole moon is lighted from the earth |
| first quarter | 7 days after the new moon, the moon is half lit |
| third (last) quarter | 7 days before the new moon, the moon is half lit |
| new moon | when the moon isn't visible at night |
| ocean tide | the rise and falls of sea levels because of the moon's gravitational pull |
| high tide | when the tide is higher that the average, happens twice everyday |
| low tide | when the tide is lower that the average, happens twice everyday |
| spring tide | when the tide is at its highest point, happens twice a month |
| neap tide | when the tide is at its lowest point, happens twice a month |
| lunar eclipse | when the moon passes the earth into its shadow |
| axial tilt | what causes the seasons, it's the angle between the axis and a line perpendicular to the orbit direction |
| seasons | four divisions of the year caused by the tilt of the earth's axis |
| wave | when a body of water curls and breaks on shore |
| umbra | area in which the shadow of the moon on the earth is total, and the area in which a total solar eclipse is experienced |
| penumbra | the area in which the shadow of the moon on earth is partial, and the area in which a partial solar eclipse is experienced |
| total eclipse | it occurs when the moon casts a total shadow called an umbra |
| partial eclipse | it occurs when the moon casts a partial shadow called a penumbra |
| polaris | the star where the north pole always points at |
Created by:
hannah_kim
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