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49 Cards in this Set
- Front
- Back
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From the earth we can see _____ of the moon
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only one side
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the moon can eclipse the sun because the moon is
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closer
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the most widely accepted scientific theory on how the moon was formed states that the moon _____
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was an object which once collided with earth
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compared to the earth. The moon has
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more craters
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a lunar eclipse can occur only during the ____ phase
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full moon
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a solar eclipse can occur only during the _____ phase
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new moon
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the temperatures on the moon's surface are
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either very hot or very cold
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when would earth's oceans experience their highest tides
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during a new moon
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when moons are compared to the planets they orbit, the earth's moon is _____ than the moons of most other planets
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larger
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when moons are compared to the planets they orbit, the earth's moon is _____ than the moons of most other planets
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farther away
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the moon has more visible craters than the earth because
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erosion erases the craters which form on earth
-most of the earth is covered by oceans -plants grow over the craters on earth -many meteorites burn up in earth's atmosphere |
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the simultanieous cration theory suggests that the earth and moon formed from the same nebula (cloud of matter) at about the same time. A problem with this theory is that it does not explain why the
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earth has more iron
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a problem with the capture theory on moon formation is that _____
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the composition of the earth and moon are very similar
-the moon would need to have been slowed down to be captured -the earth may not have enough gravity to have captured the moon |
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the impact theroy hypothesizes that _____
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the impact of an asteroid in space formed our moon
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a waxing crescent moon immediately follows a ___ moon
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new
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a waning gibbous moon immediately follows a ____ moon
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full
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the earth's tilt in combination with its orbit around the sun cause the
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seasons
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the days with the most and least hours of daylight are called
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solstices
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on the first day of summer the direct rays of light from the sun are striking the _____
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tropic of cancer
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on the first day of fall the direct rays of light from the sun are striking the _____
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equator
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the greatest temperature change caused by the seasons occur at the _____
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north and south poles
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leap years are necessary because _____
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the earth takes more than 365 days to complete its orbit
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our timekeeping system is based on the ____
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solar day
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the sequential changes in the appearance of the moon are called
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lunar phases
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a lunar eclipse occurs when the moon passes through earth's ____
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umbra
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people who see a partial solar eclipse are located in the ____ portion of the moon's shadow
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penumbra
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plane of the earth's orbit about the sun
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ecliptic
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material blasted out of impact craters on the moon that falls back to the surface
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ejecta
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electric and magnetic distrubances, or the waves, that travel through space
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electromagnetic radiation
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the moons state, in which its rotational and orbital periods are equal
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synchronous rotation
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dark, smooth plains on the moon's surface
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maria
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hanging-weight system that helps demonstrate the rotation of earth _____
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focault pendulum
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valley-like structures on the moon's surface
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rilles
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loose, ground up rock on the moon's surface
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regolith
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telescope that uses lenses to bring visible light to a focus
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refracting telescope
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how long is a lunar month
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29.5 days
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how long is a solar day
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24 hours
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earth's position around June 21 relative to the northern hemisphere
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summer solstice
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farthest point from earth in the moon's orbit
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apogee
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the portion of sunlight reflected by the moon's surface
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albedo
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what is the next phases of the the moon? new moon, _____, first quarter
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waxing crescent
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what is the next phases of the the moon? waning crescent, _____, waxing crescent
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new moon
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what is the tilt of the Earth's axis
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23.5 degrees
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the imaginary line which passes through the poles is called the
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earth's axis
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the earth is
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slightly flattened at the poles
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the tides on earth are caused by the gravitational pull of the
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the moon and sun
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what type of radiation dows not ahve to be observed above the earth's atmosphere
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visible light
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after a long period of impacts, the moon's impact basins filled with
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lava
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the features on the moon formed by objects crashing into its surface are
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impact craters
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