WEBVTT

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Welcome to "Are You Dense?"

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Hello there Jacob and welcome to "Are You Dense?"

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I'm Michael and I'll be asking you some
true or false questions.

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The grand prize is a summer internship at NASA.

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First question -  True or false?

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Density is dependent on the amount of material present.

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Ah true, because if an object

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were bigger and heavier it would have to be more dense.

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Are you dense? That's a misconception.

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Density does not change with an object's size.  If the materials'

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makeup is consistent throughout, then the size will not affect its density.

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And when you say something is heavier, you're
actually describing the object's weight,

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not its density. Density is how much mass,
the stuff, is packed in a volume.

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And it's measured by mass per unit
volume.

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Wow that's a lot.

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Yeah I know it's a lot to take in if you're dense.

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But an object's density also affects whether the object can sink or float in water.

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Let me give you an example.

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Say if you have a slice of bread and a loaf of bread.

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Both float even though the loaf of bread is obviously bigger.

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This is because the loaf and the slice of bread are made up of the same thing.  So they have the same density.

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So I get the idea of them floating and they both float because the amount of wheat in the bread compared to the size...

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It stays the same.

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So the density of an object doesn't change with the mass of the object,

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but rather by the mass compared to the object's volume.

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Exactly! But sorry you just
missed out on the internship at NASA.

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How do you feel?

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I feel like I believe the Earth isn't round. It's so crazy.

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You're saying the Earth is flat?

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Yeah. Why wouldn't it be?

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I'm done with this guy.  The Earth is round.  The flat Earth just makes me crazy.