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With the Magnetic “Hydrojet” Demonstration Kit for physical science and physics, demonstrate the deflection of charged particles by a magnetic field, and discuss the possibilities of harnessing this phenomenon for practical purposes.

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Science fiction or science fact—can water-jet propulsion really be generated using electromagnets? Demonstrate the deflection of charged particles by a magnetic field, and discuss the possibilities of harnessing this phenomenon for practical purposes. Discuss magnetic fields, electric fields, magnetic force, electrolysis. A simple demonstration that is sure to pique the curiosity of your students and have them wonder “What if?” Enough materials to repeat the demonstration almost indefinitely.

Concepts: Electric force, magnetic force, electrolysis, Newton’s second and third laws of motion.
Time Required: 20 minutes
Note: Five 9 V batteries are required, but not included.

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
Constructing explanations and designing solutions

Disciplinary Core Ideas

MS-PS2.A: Forces and Motion
MS-PS2.B: Types of Interactions
MS-ETS1.A: Defining and Delimiting Engineering Problems
HS-PS2.A: Forces and Motion

Crosscutting Concepts

Patterns
Cause and effect
Systems and system models
Energy and matter
Structure and function
Stability and change

Performance Expectations

MS-PS2-2: Plan an investigation to provide evidence that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object
MS-ESS2-5: Collect data to provide evidence for how the motions and complex interactions of air masses results in changes in weather conditions.
MS-ETS1-1: Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions.
HS-PS2-1: Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.