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Cards In This Set
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How does the sun produce energy?
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Using nuclear fusion
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What layer are you looking at when you look at an image of the sun?
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The photosphere
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In a heliocentric system, what does the Earth revolve around?
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The Sun
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What do all of the inner planets have in common?
A. They all have rings. B. They all ahve abundant liquid water. C. They all have many moons. D. They are all small and have rocky surfaces. |
D. They are all small and have rocky surfaces.
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Why don't the atmospheres of the gas giants escape into space?
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The planets have very strong gravitational pulls.
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What do the first 4 outer planets have in common?
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They are much larger than Earth and made of mainly hydrogen and helium.
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Who discovered that each planet's orbit was an ellipse?
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Johannes Kepler
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Where is the asteroid belt located?
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In between Mars and Jupiter.
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What shape are the orbits of most comets?
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Long, narrow ellipses
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Where do meteoroids usually come from?
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Comets or asteroids.
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What is the streak of light called when a meteoroid enters Earth's atmosphere?
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A meteor
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What is one condition required for life on Earth? (Only Earth has it)
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Liquid water.
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What is the hypothesis that Mars may have had the conditions needed to support life based upon?
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Evidence that liquid water may have once existed.
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In what two ways are the Earth and Venus alike?
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Size and density.
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What are Saturn's rings made of?
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Chunks of ice and rock.
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