A Scale Model

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A Density Quiz

Lead has a high density, popcorn has low density. Which is heavier, a ton of lead or a ton of popcorn?

1: The lead.
2: The popcorn.
3: You can't tell from the information given.
4: They are the same.

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What is the formula for density?
1: Density = Mass/Volume.
2: Density = Volume/Mass.
3: Density = Mass * Acceleration.
4: Density = Mass * C 2 .

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According to a popular saying and a movie title (starring Sandra Bullock), would you say 'Hope' has high density or low density?
1: High Density
2: Low Density.
3: It would have a density of 1, the same as water.
4: This is a stupid question and I refuse to answer.

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Aluminum is a metal with a lower density than lead, but they are both solid metals. Why are their densities different?
1: Aluminum has low density hydrogen atoms mixed into it.
2: Lead has a stronger gravitational attraction than aluminum.
3: Atoms are packed more tightly in lead than in aluminum, allowing more mass in a smaller volume.
4: Aluminum has a weak form of antigravity, which makes it's mass seem less and therefore its density seem less.

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If gravity differentiates materials in a planet, such that dense materials sink to the core and less dense materials rise to the crust, why doesn't the same happen with an apple or even a large boulder?
1: Gravity has a repulsive effect over short distances such as those mentioned.
2: With small masses, gravity is too weak to overcome the electro-chemical forces between molecules.
3: Small masses such as those mentioned do exhibit strong differentiation like that of a planet.
4: The internal energy cannot be overcome by gravity, thus preventing differentiation.

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