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Product 13168

By: David A. Katz, Retired, Wilmington, DE

The Density Box Demonstration Kit for physical science and physics brings a clever and mesmerizing demonstration of density.

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Product Details

Students watch with amazement as warm water rises and cold water sinks in this clever demonstration of density. The demonstration apparatus is a clear acrylic chamber that is divided down the middle with a removable wall. Hot, red water is placed on one side of the chamber and cold, blue water on the other. The center dividing wall is then carefully removed, allowing the two solutions to mix. The two different-temperature solutions very dramatically separate with the hot, red water on top and the cold, blue water on the bottom. A great demonstration when discussing convection currents, air turbulence and water turnover in lakes and ponds. Includes instructions and teaching information.

Concepts: Density, convection currents, differential heating.
Time Required: 15 minutes
Materials Provided: Density Box Demonstration Device.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Developing and using models

Disciplinary Core Ideas

MS-PS3.A: Definitions of Energy
MS-ESS2.C: The Roles of Water in Earth’s Surface Processes
HS-PS3.A: Definitions of Energy
HS-PS3.B: Conservation of Energy and Energy Transfer
HS-ESS2.A: Earth’s Materials and Systems
HS-ESS2.C: The Roles of Water in Earth’s Surface Processes

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity
Systems and system models
Stability and change
Energy and matter

Performance Expectations

MS-PS1-4: Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.
MS-PS3-4: Plan an investigation to determine the relationships among the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample.
MS-PS3-5: Construct, use, and present arguments to support the claim that when the kinetic energy of an object changes, energy is transferred to or from the object.
MS-ESS2-4: Develop a model to describe the cycling of water through Earth’s systems driven by energy from the sun and the force of gravity.
HS-PS3-4: Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics).
HS-ESS2-3: Develop a model based on evidence of Earth’s interior to describe the cycling of matter by thermal convection.