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40 Cards in this Set
- Front
- Back
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The Earth is what shape and who discovered it?
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Spherical Shape, Aristotle discovered by the earths curved shadow on the moon during an eclipse
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What is the circumfrence of the Earth?
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24,903 miles or 40,074 kilometers
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The earth spins on a ___º axis in what direction?
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23.5º, counterclockwise
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What is the period of rotation?
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23.56
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When is summer?
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northern hemisphere is tilted towards the sun (tropic of cancer 23.5ºS)
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When is winter?
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Northern Hemisphere is tilted away from sunlight (Tropic of Capricorn 23.5º S)
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What causes seasons?
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Earth revolution around the sun, earth spins counter-clockwise
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What is a solstice?
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When the Earth is mostly tilted towards or away from the sun
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When is a summer solstice and what is it?
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June 20-22, longest day of the year (15 hours)
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When is the winter solstice and what is it?
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December 20-22, shortest day of the year (9 hours)
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What is an Equinoxes?
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When the sun is directly over the Earths equator not tilted towards or away from the sun
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What equinoxes is during
march 20-22? |
Vernal
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What equinoxes is during September 20-22?
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Autumnal
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Earths Moons name is and how old is it?
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Luna, 4.5 billion years old, younger then the Earth
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What is the diameter of the moon, where does our moon rank in the solor sytem, and where does it rank by ratio?
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2,160miles, 5th larget in solar system, 2nd largest moon by ratio
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The diameter of the moon is __% of Earths
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27%
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THe moon is ___miles aways from the Earth
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238,866
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True or False: The moon has no atmosphere?
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True
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What is the Dark side of the Moon?
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The same side of the moon always faces the Earth
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What is the moon rotation around earth and what is it revolution on axis?
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27.3 days around the Earth, 27.3 recolution on axis
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Why do we always see the same side of the moon?
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One side of the moon is heavier then the other, gravity pulls harder on the heavier side
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Define Full Moon
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The moon's illuminated side is facing the Earth. The moon appears to be completly illuminated by direct sunlight
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Define New Moon
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The moon's un-illuminated side is facing the Earth. The moon is not visible (only during a solar eclipse)
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Define Quarter Moon
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A week after the New Moon and the Earth has turned about a quarter of its way around the Earth we see half of the illuminated part
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Define Waxing Phases
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As the moon moves around the Earth we see more and more of the illuminated half (increasing)
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The illuminated part of the moon that we can see decreases, what phase is this?
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Waning Phase
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THe moon appears to be more than one-half ut not fully illuminated by the direct sunlihgt, what phase is this?
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Gibbous Phase
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A small part of the moon which gets bigger and bigger by the day, what phase is this?
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Crescent Phase
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Phase order, and days of rotation
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new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, Last quarter, waning crescent, new Moon, 29.5 days
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Solar Eclipse___moon, Lunar eclipse___moon
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New Moon, Full Moon
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What is a solar eclipse,occurs during what moon phase?
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When the moon casts a shadow on the Earth, new moon
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What is a Full Eclipse?
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the sun is completely out by the moon
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What is a Partial Eclipse?
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The moon passes partly in front of the sun
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What is a Lunar Eclipse
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When the earht casts a shadow on the moon; moon is directly behind the Earth
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What is a tide?
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THe changes in the oceans water levels at regualt intervals you can see it by the shore
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What causes a tide?
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The gravitationa; pull from the mon (70%) and the sun (30%)
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High tides are where?
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Same side or opposite side of the moon
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Spring Tides occur when?
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During a full or new moon
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Neap Tides are during what moon phase?
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Quater Moon
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Low tides are where?
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90º from the moon
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