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36 Cards in this Set
- Front
- Back
A rocky object that revolves around the sun
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A. asteroid
B. meteoroid C. meteor |
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A small piece of rock or metal that travels in space around the sun
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A. asteroid
B. meteoroid C. meteor |
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A bright streak of light that passes through the Earth's atmosphere
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A. asteroid
B. meteoroid C. meteor |
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A ball of ice, dust, and gases that travels through space and orbits the sun
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A. comet
B. meteorite C. asteroid |
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Meteor that reaches the earth's surface
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A. comet
B. meteorite C. asteroid |
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What kind of path do the plantets follow around the sun?
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An oval path
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What is the largest planet?
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Jupiter
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What is the smallest planet?
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Pluto
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Why are Uranus and Neptune alike?
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Because they both have rings, are made of gases and are blue-green
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What keeps the planets in orbit as they orbit the sun?
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Gravity
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Why do planets often look brighter than the stars?
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Because the planets are closer to the Earth than the stars
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How do astronomers measure distances in the solar system?
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In astronomical units (AU)
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What is an AU equal to?
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93,000,000 miles
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What is the closest object to the Earth in the solar system?
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The moon
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Where is the asteroid belt located?
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Between Mars and Jupiter
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How are meteoroids formed?
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When asteroids collide or a comet breaks up
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If a comet were moving away from the sun, where would its tail be?
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On the side away from the sun
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What would happen if the Earth did not receive any energy from the sun?
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The Earth would become dark and cold
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What causes tides on Earth?
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The gravitational pull of the moon and sun
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The distance light travels in one year
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A. light year
B. constellation C. galaxy |
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Stars that appear to be in a group when viewed from Earth
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A. light year
B. constellation C. galaxy |
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A group of billions of stars, dust, and gases in space held together by gravity
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A. light year
B. constellation C. galaxy |
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Why does the sun seem brighter than other stars?
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Because the sun is much closer to Earth
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How long does it take for light from the sun to reach the Earth?
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8 minutes
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What does a star's brightness depend on?
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Its size, temperature, color, and distance from the Earth
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Are astronomical units (AU) useful in measuring distance to the star, why or why not?
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No, because the units are not big enough to measure long distances in space
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What do astronomers use to measure distances to stars?
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They use a light year, which is about 6 trillion miles
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Name the order of the colors of the stars from the coolest to the hottest.
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red, orange, yellow white, and blue
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What galaxy is our solar system in?
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The Milky Way galaxy
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The bending of light as it passes from one material to another
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A. refraction
B. reflection |
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The bouncing of light off a surface
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A. refraction
B. reflection |
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What do telescopes do?
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Make distant objects appear closer and clearer
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How many kinds of telescopes are there that gather and focus light and what are there names?
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2 kinds, reflecting and refracting telescopes
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What do telescopes in space do?
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They produce better images than those on Earth because space images do not have to pass through the atmosphere, which can blur the focus
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Name a famous space telescope.
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The Hubble Telescope
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Science Flashcards
Unit C Chapter 4 Astronomy |
Science Flashcards
Unit C Chapter 4 Astronomy |