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Bottle Balance Beam—Demonstration Kit

By: Robert Farber, Central High School, Philadelphia, PA

Item #: AP6376 

Price: $15.83

In Stock.

In the Bottle Balance Beam Demonstration Kit for physical science and physics, the water bottle and wooden board seem to defy gravity. An attention-getting and memorable demonstration of the concept of the center of gravity.

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Product Details

This balancing act will be a real attention getter! Students will remember the concept of the center of gravity involved in this demonstration. A large water-filled bottle and a wooden board seem to defy gravity as together they balance on the board’s edge. You have to see it to believe it! Includes detailed instructions and a reproducible student worksheet.
Concepts: Center of gravity, gravity, balance.
Time Required: 10 minutes
Note: An innovative density demonstration can also be performed using blue kerosene and mineral oil, available separately.


Materials Included in Kit: 
Bottle balance beam
Soda bottle with cap, 2 L

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Engaging in argument from evidence

Disciplinary Core Ideas

MS-PS2.A: Forces and Motion
HS-PS2.A: Forces and Motion

Crosscutting Concepts

Cause and effect

Performance Expectations

HS-PS1-2: Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
HS-PS1-7: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.