What is Density?

Density is a ratio of mass to volume. Density causes some items to sink when tossed in water and other items to float. In this video I cover the following.
What is density?
What is mass?
Why do objects have mass?
How do atoms effect density?
What can we learn from a density column?
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Density Demonstrations
• Density Demonstration ...
How to find the density of a solid
• Find the density of a ...
How to find density,mass, and volume
• How to find density, m...
What is density?
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What is density?
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Gas Density
• Gas Density