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Pershing Astronomy 4

Pershing Astronomy 4--A Family

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