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| How does the density of the moon compare to densities of Iron (8g/cc), rock (3.7 g/cc), and water (1g/cc)? |
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| What can you conclude about the size of the ion core in the Moon compared to that of earth? |
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| A much smaller fraction of the moon is iron |
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| Compared to the lunar highlands, the lunar maria are |
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| The Moon does not undergo plate tectonics because...? |
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| ...it's mantle is cold and rigid. |
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| Features of the Solar System that the Solar Nebula Hypothesis explains?(5) |
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-The planets nearest the sun contain only small amounts of substances that condense at low temperatures.
-All the planets and the Sun, to the extent that we know, are the same age.
-All the planets orbit the Sun in the same direction.
-The planets farthest the Sun contain almost exactly the same substances in the same abundances at the sun
-All the planets move in orbits that lie in nearly the same plane. |
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| A moon's radius radius 1.64x10^6 m, while it's mass is 8.25 ✕ 1022 kg. Find the surface gravity on the moon from these values. |
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| At what times would you expect high tides when the Moon is at first quarter? what about low tides? |
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HIGH TIDES: sunrise and sunset
LOW TIDES: noon and midnight |
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| The numerous craters we see on the solid surfaces of so many of the Solar Systems bodies are evidence that... |
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| ...they were bombarded in their youth by many solid objects. |
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| aturn's average density is 0.7 g/cc. Suppose that Saturn's mass stayed the same but its radius was 6 times smaller than the current radius, what would be its average density? |
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| Suppose the Saturn's mass stayed the same but its radius was 6 times larger than the current radius, what would be its average density? |
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| More than 99% of the mass of the Solar System is contained in |
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| Venus is 0.7AU from the Sun. The Sun will be about ______ as bright on Venus than it is on the Earth. |
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| Mars is 1.5AU from the Sun. The Sun will be about ______ as bright on Mars than it is on the Earth. |
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| Communications in space is challenging. NASA's Curiosity Rover is on Mars and is controlled from Earth via commands sent with radio waves. How long will it take for Curiosity to respond to a command if it and the command tower are 2.5 AU apart? |
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| Which of the following has provided evidence that the volcanoes of Mars are relatively young? |
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| The volcanoes have relatively few impact craters on them. |
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-always points away from the sun
-is gas and dust expelled from the comet by the sun's heat and radiation |
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| Compute the average density of the Sun. Use 2e33g for the mass and 7e8m radius. |
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| How does that compare to the density of Jupiter? |
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| The Sun's energy output is roughly 4e+26 Joules/second. Each proton-proton fusion reaction releases about 4.3e-12 Joules. Use these two facts to determine how many fusions are happening per second. It will be a very big number! |
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| Only about 10% of the Sun's mass is inside the core and will be processed by the proton-proton chain. (The rest just makes the core hot and dense). What's the mass of the core of the Sun? |
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| Convert your answer for part b)(2e29) into the number of protons (i.e. hydrogen nuclei) in the solar core. Use the fact that a proton has a mass of about 1.7e-27kg |
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| How many seconds will it take for the Sun to fuse that many protons into Helium? convert this so billions of years? |
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3.1e17
and 1e+01 billion years |
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