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Chapter 5
Earth, Moon and Sun
| Term | Definition |
|---|---|
| Axis | The imaginary line that passes through Earth's center and the North and South poles. |
| Rotation | The spinning of Earth on it's axis. |
| Revolution | The movement of one object around another. |
| Orbit | Earths path around the Sun. |
| Calendar | A system of organizing time that defines the beginning, length, and divisions of a year. |
| Solstice | The Sun appears to be farthest north of the equator once a year and farthest south once each year. |
| Equinox | Halfway between the solstices the sun is directly over the equator, and neither hemisphere is tilted toward or away from the sun. |
| Phase | The different shapes of the moon you see from earth. |
| Eclipse | When an object in space comes between the sun and a third object, it casts a shadow on that object. |
| Solar Eclipse | When the moon passes between the earth and the sun, blocking the sunlight from earth. |
| Umbra | The very darkest part of a shadow |
| Penumbra | The lighter part of the moons shadow. |
| Tide | The rise and fall of ocean water that occurs every 12.5 hours. |
| Spring Tide | When the Sun, Earth, and the Moon are nearly in a line during a new moon causing the greatest difference between consecutive low and high tides. |
| Neap Tide | During the moons first quarter the Sun is at a right angle to the Moon and Earth causing the least difference between consecutive low and high tides. |
| Lunar Eclipse | At a full moon when earth passes between the sun and the moon. |
Created by:
Bmacyscience
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