Astronomy Study Guide Test Questions – Flashcards
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Astronomy
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the study of stars, planets and other things in space
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Revolution
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movement of one object around another
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Rotation
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spinning motion
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Orbit
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a PATHWAY of an object around another object
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Planet
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an object that resolves around a star
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Star
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huge sphere of gas that can give off light and heat
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Axis
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imaginary vertical line around which an object rotates
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Solstice
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two days during the year when the sun is directly over the North or South Pole
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Equinox
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two days during the year when the sun is directly over the earth equator
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Lunar Eclipse
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Occurs when Earth's shadow falls on the Moon.
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Solar Eclipse
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occurs when a new moon blocks our view of the sun
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Satellite
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any object that revolves around another in sapce
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comet
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a dirty snowball
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asteroid
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chunks of metal and rock covered in ice
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meteoROID
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pieces of rock from old comets or asteROIDS
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meteor
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a shooting star
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meteorite
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part of a meteoroid that hits the earth's surface
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galaxy
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a large group of stars
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universe
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contains billions of galaxies
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light year
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the amount of time it takes for light to travel in one Earth year
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astronomical unit
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the average distance from Earth to the Sun
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constellation
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A group of stars that form a pattern in the sky
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Our solar system is part of which galaxy?
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Milky Way
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What are the 3 effects the Moon has on Earth?
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Tides, eclipses, light at night
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How many days does it take the moon to rotate around the Earth?
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29 days or about 1 month
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How many days does it take the earth to rotate around the sun?
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365 1/4 days or about 1 year
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When it moon is less lit up, it's called....
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waning
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When it moon is more lit up, it's called....
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waxing
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Then length of a day on Earth is about the amount of time it take the earth to ....
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rotate on it's axis
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How are the seasons created?
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The tilt of the Earth's axis
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What are the three shapes of galaxies?
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elliptical, spiral, irregular
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What shape is our Milky Way Galaxy?
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spiral
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How are stars named?
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They are named after people or animals
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What is another name for the North Star?
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Polaris
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The milky way galaxy contains billions of ______, including our sun
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stars
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What would happen if the earth moved slower?
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We would have longer days and longer seasons
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Describe the 4 inner planets
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smaller, hotter and rocky
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Describe the 4 outer planets
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larger, colder, gaseous, rings, more moons
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Where are stars born?
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Nebulas. A large amount of gas and dust in space
