Pershing Astronomy 4--A Family
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What characteristics do terrestrial planets have? | they resemble Earth and have solid, rocky surfaces
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| Why would we always see the same side of the moon? | its period of rotation is the same as the period of revolution
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| What evidence do we have the supports the current theory about the moon's origin? | the moon rocks are similar to the Earth's mantle
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| How old do scientists think our solar system is? | 4.6 billion years
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| What is the current theory of the origin of our moon? | a large mass hit Earth and sent a piece of the mantle into space
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| What causes the phases of the moon? | the positions of the moon, sun and Earth
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| What body is most likely to have many craters? | a moon with no atmosphere
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| What system is used to rate the hazard level of an object coming towards Earth? | Torino scale
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| What is the main difference between asteroids and meteoroids? | main difference is the size--asteroids are larger
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| In what type of eclipse does the moon completely cover the sun? | total solar eclipse
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| What is the most useful unit for measuring distances within the solar system? | the astronomical unit
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| What do gas planets have that terrestrial planets do not? | an atmosphere that is has a very thick layer of gas
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| Why do active planets and moons have fewer impact craters? | their atmospheres burns up small objects and the wind and erosion remove many of the craters
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| What do we not have each month because the moon's orbit is tilted? | solar or lunar eclipses
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| What do we do to learn the history of our solar system | study smaller bodies such as comets or asteroids
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| Know the phases of the moon |
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| What is a meteoroid called after it has hit the Earth's surface? | meteorite
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| About how long does it take the moon to rotate on it's axis? | 29.5 days
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| About how long does it take our moon,Luna, to revolve around the Earth? | about one month
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| Which planets are called the terrestrial planets? | the inner planets
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| What are satellites? | natural or artificial objects that orbit larger objects
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| What do some scientists call comets? | dirty snowballs
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| Which moon is larger than the planet Mercury? | Ganymede
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| Which moon originated when a mass collided with Earth? | Luna
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| What is the name of the most volcanically active body in our solar system? | Io
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| Which moon seems to have broken apart and then put back together with gravity? | Miranda
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| Which moon's atmosphere may have been similar to the the Earth's early atmosphere? | Titan
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| Know the planets 9and dwarf planet) in order starting closest to the sun | M, V, E, M, J, S, U, N and P
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| Between which 2 planets is the asteroid belt located? | Mars and Jupiter
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