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conservation of mass

Physical and Chemical Change: Conservation of Mass
Image: Jacques-Louis David

Physical and Chemical Change: Conservation of Mass

Matter can't be created or destroyed. That's one of the most important ideas in science. Meet the genius who came up with it (just before the guillotine got him). And watch experiments that prove it.

But remember: Matter CAN change its form — even into energy. Start exploring the conservation of mass.

Zenex Foundation
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Law of Conservation of Mass Demonstration

Law of Conservation of Mass Demonstration

Here's how to demonstrate the conservation of mass using vinegar, baking soda, two balloons, a test tube and holder, and a scale. More...

Activity
Portland State University
The Law of Conservation of Mass

The Law of Conservation of Mass

If the amount of mass has always remained constant, how is that the universe can grow? This video answers that question by unraveling the law of conservation of mass. More...

Video
TED-Ed/Todd Ramsey
Conservation of Mass

Conservation of Mass

Mass is conserved--that's clear. But what IS mass? And how do we calculate it if it's a liquid or a gas? NASA explains. More...

Article
NASA
Conservation of Mass and Precipitation Reactions

Conservation of Mass and Precipitation Reactions

Since mass isn't created or destroyed, equations showing chemical reactions have to balance. You must have the same number of atoms on the left side of the equation as on the right. More...

Article
BBC
Rotten Truth (About Garbage)

Rotten Truth (About Garbage)

Since matter can't be destroyed, neither can garbage. That's why recycling and composting are so important. More...

Article
ASTC & Smithsonian
Antoine-Laurent Lavoisier

Antoine-Laurent Lavoisier

This 18th-century chemist's legacy includes the law of the conservation of mass and devising the way we write chemical equations. Sadly, it also includes losing his head during the French Revolution. More...

Profile
Chemical Heritage Foundation
Interactive Student Tutorial

Interactive Student Tutorial

In this interactive tutorial explore the law of mass conservation and the law of definite proportions. More...

Interactive
Prentice Hall
Life and the Law of Conservation of Mass

Life and the Law of Conservation of Mass

Not only is mass conserved; on Earth, most elements are as well. So ecologists can track their movement through animals, plants, and entire eco-systems. Find out how. More...

Article
Nature
Mass-Energy Equivalence

Mass-Energy Equivalence

So now you've heard a million times that mass can't be destroyed. But it CAN change into energy. How much energy? Put it this way: A marble could blow up a city. More...

Video
BrightStorm

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