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Pershing - Astro Ch4
Astronomy Test - Ch. 4 : A Family of Planets
| Question | Answer |
|---|---|
| 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
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