Technically, you really want to know which has more mass (greater gravitational effect), or which has greater density. Earth by far has more mass, and is far larger. On the other hand, they are very close in average density. The average density of Earth is 5.515 g/cm^3 (the densest planet in the solar system), the average density of Mercury is 5.427 g/cm^3 (#2).
The reason for this is quite interesting. Like Earth, Mercury has an iron rich core, which means that early in its life Mercury separated out into the heavy dense metals and lighter rocks. The light stuff floated to the top and became the crust, and the heavy stuff sank to the middle and became the core, just like Earth.
It seems, though, that sometime early in Mercury's history is collided with a huge planetesimals. The collision stripped away almost all the crust, sending it into the sun and to the outer planets (Venus and Earth). It was a cataclysmic collision, destroying the planet that was Mercury and leaving barely more than the core, which is what there is now. Mercury used to be about 2.5 times bigger than it is now, bigger than Mars and rivaling Earth and Venus. But because of that collision, little more than the core remains, which is why it is so dense.
2006-11-18 09:51:29
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answer #1
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answered by ZenPenguin 7
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Earth
2006-11-18 08:39:18
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answer #2
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answered by Anonymous
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Just ask wikipedia -
"Mercury (0.4 AU), the closest planet to the Sun, is also the least massive of the planets, at only 0.055 Earth masses"
2006-11-18 08:44:33
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answer #3
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answered by Gary H 6
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Earth.
THINK!, for once!
Earth has a moon that is (Ithink) larger than mercury.
That means it has more mass, which with gravity in play from the sun, makes Earth heavier.
2006-11-18 09:36:23
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answer #4
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answered by Anonymous
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I would guess earth cuz it's bigger but this is probably a trick question and it's probably mercury.
2006-11-18 08:38:32
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answer #5
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answered by Anonymous
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meant to be any planet has no weight yet particularly it particularly is mass. As you will locate, that's levitated. it particularly is like floating obtainable in the distant area. we can't actual tell what's the burden of the mercury or the different planet.
2016-10-22 07:53:04
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answer #6
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answered by ? 4
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Is this one of those "Pound of feathers v pound of lead" type questions?
The gravity is different on Mercury, so Regis, I'll have to poll the audience.
2006-11-18 08:46:44
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answer #7
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answered by teran_realtor 7
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depends on the differences of gravitational pull between the two. I would guess mercury
2006-11-18 08:38:43
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answer #8
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answered by Anonymous
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earth
2006-11-18 08:38:27
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answer #9
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answered by noho09876 2
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Since both are in a free fall orbit around the sun, they are both weightless. Just like you would be while riding in the vomit comet during free fall.
2006-11-18 09:35:47
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answer #10
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answered by Alan J 3
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