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| Jupiter, Saturn, Uranus and Neptune |
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| all have rings around their equators. |
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| The tail of a comet always points |
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| away from the Sun and becomes longest and brightest at perihelion. |
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| The most distant objects in our solar system are |
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| Which statement about extra-solar planets found to date is true? |
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| Some are so close to their stars that their periods are just a few days. |
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| What is true about solar system densities? |
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| The denser planets lie closer to the Sun |
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| Meteorites are important because |
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Meteorites are important because
A) large ones may cause mass extinctions.
B) some come from the Moon and Mars, as well as the asteroid belt.
C) they contain pristine material from the solar nebula. |
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| In some cases, we have seen extra solar planets pass in front of their stars. |
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| In addition to revolving around the Sun counter clockwise, most planets also rotate on their axis counter clockwise |
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| At what phase are the tides least noticeable? |
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| The Moon's near side always faces Earth due to |
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| critical part of the atmosphere for protecting life on the ground from excessive ultraviolet |
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| We determing the structure of the Earth's core using |
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| In what part of our atmosphere do we live? |
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| When strong solar winds are displaced poleward by our magnetic fields, we get |
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| Which of these theories seems to best explain the Moon's origin? |
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| The Moon's lower density indicates it has a smaller concentration of iron in its core, as does the absence of a lunar magnetic field. |
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| The Moon and the crustal rocks of Earth are similar in density. |
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