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Pershing - Astro Ch4

Astronomy Test - Ch. 4 : A Family of Planets

What does "planet" mean? wanderer
Where does the name terrestrial planets get it's name? because inner planets resemble Earth and have solid/rocky surfaces
Moon rocks lead us to believe our solar system is about how many years old? 4.6 billion years
How do scientists measure distance in space? speed of light
What is the best unit for measuring solar system distances? astronomical unit
vocab: meteors rocky bodies that burn up in the sky
Who used a telescope to explore the night sky in the 17th century? Galileo
How do gas giants differ from terrestrial planets? gas giant's atmospheres are made of a very thick gas layer
Why don't eclipses happen monthly? the orbit of the moon is tilted
How are meteoroids and asteroids different? asteroids are larger than meteoroids
vocab: phases change in the appearance of the moon
What evidence do we have supporting the current theory of the moon's origin? moon rocks are similar to rocks in the Earth's mantle
Know the 8 phases of the moon and know how to label them. new moon, full moon, first quarter, third quarter, waning gibbous, waxing gibbous, waning crescent, waxing crescent
What type of body will likely have many craters? one with no atmosphere
How does atmosphere affect asteroid impact craters? atmosphere burns up small objects and rain/erosion remove craters
vocab: meteorite a meteoroid after it strikes the surface of Earth
Do we always see the same side of the moon? yes, because its period of rotation is the same as its period of revolution
Why do we study comets and asteroids? help us understand our solar system's history
vocab: terrestrial inner planets of our solar system
What system is used to rate the hazard of an object moving towards Earth? Torino scale
vocab: comets dirty snowballs made of ice, rocks, & dust
What is a total solar eclipse? the moon completely covers the sun
vocab: revolves the time it takes for the moon to circle the Earth
How did the moon originate? a large body struck Earth and blasted part of the mantle into space
vocab: rotates what the moon does on its axis
Why does the moon have phases? the position of the moon, sun, and Earth
vocab: satellites an smaller object that orbits a larger object
Mercury planet year is 88 Earth days long
Neptune planet with the Great Dark Spot
Saturn planet with a spectacular ring system
Earth planet that contains life
Pluto smallest planet in our solar system
Venus planet that spins with a retrograde rotation
Know the order of the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
Where are the comets of the Oort Cloud found? after Pluto
Where is the asteroid belt located? between Mars and Jupiter
Created by: ellist