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Water Marbles—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP7429

Price: $21.40

In Stock.

The Water Marbles Polymer Chemistry Demonstration Kit is a fun discrepant event demonstration. Explore the properties of superabsorbent polymers using water marbles. Amaze your students by “floating” a steel sphere on “water.”

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Product Details

Explore the properties of superabsorbent polymers using water marbles. Amaze your students by “floating” a steel sphere on “water.” Since the water marbles have essentially the same refractive index as water, the steel sphere will appear to float on the surface of the water. Students will learn about the refractive index of water and the properties of polyacrylamide spheres. Students can also calculate how much the spheres have “grown” and how the different refractive indexes of air and water illuminate or conceal the presence of spheres. A fun discrepant event demonstration!

Concepts: Superabsorbent polymers, index of refraction, discrepant event.
Time Required: 15 minutes

Specifications

Materials Included in Kit: 
Laser pointer, 2 in 1
Ruler, metric/english, clear, 15 cm
Steel ball, solid, 1-5/16"
Water marbles, 10 g


Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Using mathematics and computational thinking

Disciplinary Core Ideas

MS-PS4.A: Wave Properties
HS-PS4.A: Wave Properties
HS-PS2.B: Types of Interactions

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity

Performance Expectations

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
HS-PS1-3: Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.