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41 Cards in this Set
- Front
- Back
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How many miles away is the Moon from Earth?
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238,866 miles
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Why does the same side of the moon always face earth? Why?
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The Moon spins on its axis at the same rate that it revolves around the earth, because the gravity pulls the heavier side which keeps it facing the same way
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What are 2 factors that cause the phases of the moon?
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1. position of the sun, earth, and moon
2. light from the sun reflects off the moon, the moon does not create its own light |
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How long does it take for a moon to have 1 full rotation?
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29.5 days
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What is the order of the phases?
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New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Waning Crescent, New Moon
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What causes night and day?
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Rotation of the Earth on its axis
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What causes seasons?
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Earth revolves around the sun clockwise, the tilt of the axis (23.5º)
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What is a solstice? When are the dates of the solstices?
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when the earth is most tilted toward or away from the sun, Summer Solstice- June 20-22 (longest day of the year), Winter Solstice- December 20-22 (shortest day of the year)
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What is an Equinox? When are the dates of the equinoxes?
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the sun is directly over the earths equator; not tilted towards or away from sun, Vernal- March 20-22, Autumnal- September 20-22
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What is the circumference of the earth?
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Circumference- 40,074 kilometers or 24,903 miles
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What is the period rotation of the earth?
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23 hours, 56 minutes
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What is the rate of its spin?
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1669.75 km/hr or 1040- mi/hr
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Why do we use the phrase "The Dark side of the moon"?
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Only one side of the moon faces the earth- the side we see (illuminated), we don't see the other half so it is called the DArk side of the moon
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What is an eclipse?
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when one object (earth or moon) casts a shadow on another
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what kinds of eclipses are there?
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Solar, Lunar
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What is a solar eclipse?
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moon casts a shadow on the earth
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What is a lunar eclipse?
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earth casts a shadow on the moon; moon is directly behind Earth
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What is a New Moon?
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The Moon's unilluminated side is facing the Earth. The Moon is not visible (except during a solar eclipse).
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What is a full moon?
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the Moon's illuminated side is facing the Earth. The Moon looks like it’s completely illuminated by direct sunlight.
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Where is the Moon located?
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Inbetween the Sun and Earth
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What is a tide?
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changes in the ocean water levels and regular intervals
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Where are high tides?
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same side or opposite moon
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Where are low tides?
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90º from moon
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What is the most accepted moon formation theory?
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Collision (ejected ring theory)
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What phases of the moon would you see during the day?
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New Moon, crescent phases, half quarter moons
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Because of the tides, how much is the earth rotation slowing every century?
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1/500
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Describe the shape of the earth
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Almost spherical, wider around the equator
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What latitude is 23.5º north of the equator?
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Tropic of Cancer
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How long does it take the earth to go around its axis?
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23 hours, 56 minutes
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How long does it take the earth to go one time around the sun?
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365.25 days
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How long does it take to complete one full moon phase cycle?
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29.5 days
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How much of the moon is always illuminated by the sun?
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50%
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How long does it take the earth to go around the sun by the minute?
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365 days, 5 hours, 48 minutes
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Howlong does it take the moon to orbit once around the earth?
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27.3 days
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Give the month of the year of the last blue moon and the next blue moon
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Next- June 2007, Last- July 2004
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What 2 factors cause seasons?
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tilt of the earth on its axis, earth orbiting the sun
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What type of eclipse is this? (Sun, Moon, Earth)
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Solar
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What is a blue moon?
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Second moon in the same month
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what is the circumference of the earth?
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a. 24,010 miles
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What are the 4 main theories of moon formation-examples?
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Ejected moon- most accepted
Fission- moon was once attached to earth Capture- moon formed elsewhere Condensation- formed out of the same nebula |
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Explain the alignment/position of the Earth, Moon, Sun during a spring tide, and why it causes maximum high tides?
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New Moon or full moon- all pulling water in same direction
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