Moons, Tides, Eclipses, & Seasons
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Created by:
juliefields on December 3, 2010
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30 terms
Terms | Definitions |
|---|---|
 How often does a lunar eclipse take place? | 2 to 4 times per year |
| How many degrees is the earth tilted? | 23.5 degrees |
| How long does it take the moon to orbit the earth? | 28 to 29 days |
| How old is the Earth? | 4.6 billion years |
| How long does it take to go from high tide to low tide? | 6 hours and 12 minutes |
| How do scientists think the moon came into being? | A collision occurred between the earth and a large object that blasted away part of the earth's mantle |
| During this type of eclipse, the moon is farther from the earth and a ring of sunlight surrounds the dark disk | Annular Eclipse |
| Why do we always see the same side of the moon from Earth? | Because its period of rotation equals its period of revolution |
| Why don't solar and lunar eclipses occur every month? | Because the moon's orbit is tilted |
| When a small sliver of the moon is visible | Crescent |
| When the entire surface facing the Earth is illuminated; one whole side of the moon is visible | Full moon |
| When the moon is more than half full | Gibbous |
| When the Earth comes between the sun and the moon and the shadow of the Earth falls on the moon | Lunar eclipse |
| These tides occur during the 1st and 3rd quarter phases of the moon. | Neap Tides |
| When none of the moon's surface facing the earth is illuminated; none of the moon is visible | New moon |
| Are all eclipses visible? | No |
| Is the moon's atmosphere the same as Earths? | No, it is much thinner. |
| The lighter outer part of a shadow; the area in which the shadow of an object is partial | Penumbra |
| When one half of one side of the moon is visible | Quarter moon |
| These are caused by the tilt of the Earth's axis and take place during new and full moon phases of the moon | Seasons |
| When the moon comes between the Earth and the sun and the shadow of the moon falls on part of the Earth; these occur during New Moon | Solar eclipse |
| Tides that are higher and lower than usual | Spring Tides |
| The season during which the northern hemisphere is tilted toward the sun, but the earth is farthest from the sun | Summer |
| What causes the phases of the moon? | The positions of the moon, Earth, and the sun in relationship to one another |
| These are caused by the pull of the moon on the Earth. | Tides |
| When the moon comes between the Earth and the sun and completely covers the sun as viewed from Earth | Total solar eclipse |
| The area in which the shadow of an object is total; the darkest inner part of the shadow of an eclipse | Umbra |
| When the visible portion of the moon is getting smaller | Waning |
| When the visible portion of the moon is getting larger | Waxing |
| The season when the earth is closest to the sun | Winter |
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