the best science on the web about
volume & density

About Eureka!
Image: iStockphoto.com/kianhwi

About Eureka!

Archimedes had his big volume and density idea while bathing. He was so excited that he ran naked through the streets yelling "eureka." (I have found it!)

Check out this page before your next test and you may run through your school yelling, "I passed it!" (Hopefully not naked, though.) And definitely think of volume and density the next time you bob for apples, not limes.

Bellarmine University
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Floating Lemons and Sinking Limes

Floating Lemons and Sinking Limes

Anyone who's ever bobbed for apples knows they float in the metal tub of water. Find out why — and why you could bob for lemons but not limes. More...

Activity
Steve Spangler Science
A Density Experiment You Can Drink!

A Density Experiment You Can Drink!

Liquids that are less dense float on top of those that are more dense. This fact will allow you to create a colorful, nutritious, multi-level drink. More...

Activity
Science Bob
Density

Density

Here's a great intro to density, which also shows that even great teachers make mistakes. Can you find the error in this video? Hint: The correct answer is 19.27 kg/L. More...

Video
Bozeman Science
Density and Floating

Density and Floating

Why do ice and Ivory soap float? Scientists weigh in to explain density and its relationship to buoyancy. More...

Article
Argonne National Laboratory
Density Demonstration

Density Demonstration

This simple, yet amazing, demonstration of density could have you switching to diet colas or maybe even milk. More...

Video
Science Boom
Eureka! Volume and Density

Eureka! Volume and Density

You won't find volume and density made clearer, or funnier, than in this old "Eureka!" cartoon. More...

Video
SchoolTube
How We Measure Volume

How We Measure Volume

How do you measure the volume of a cube? You'll find 8 resources here that spell it out and test your knowledge with sample questions. More...

Video
Khan Academy
Make an Egg Float in Salt Water

Make an Egg Float in Salt Water

Is the density of salt water greater or less than that of tap water? All you need is an egg to find out. More...

Activity
Science Kids
Mass, Volume, and Density

Mass, Volume, and Density

NHL players rely on ice technicians to create the smooth, hard surface they need to score. And the technicians rely on their knowledge of mass, volume, and density. More...

Video
National Science Foundation
Mass, Volume, Density Quiz

Mass, Volume, Density Quiz

Think you've mastered the relationship between mass, density and volume? Then try this quiz. More...

Interactive
Edinformatics.com
Performing Arithmetic Calculations on Units of Volume

Performing Arithmetic Calculations on Units of Volume

Do not mistake ounces for fluid ounces: The first is a measure of weight, the second a measure of density. More...

Video
Khan Academy
Specific Gravity

Specific Gravity

Specific gravity is the density of an object divided by the density of water. Who would want to know such a thing? A sea captain, for one. Her life might depend on it. More...

Video
Khan Academy
Volume and Surface Area

Volume and Surface Area

How do you find the volume and surface area of cones, cylinders, and spheres? This video offers a super-clear explanation. More...

Video
Khan Academy
What Would a Teaspoonful of Neutron Star Do to You?

What Would a Teaspoonful of Neutron Star Do to You?

Imagine a teaspoonful of matter so dense, it has as much mass as a mountain. That's what you'd find on a neutron star. It's probably a good idea not to go there. More...

Article
io9

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