Bend it, but don't break it. Groups investigate the strength of different materials. Using a procedure in the seventh segment of a 22-part series on aviation, pupils determine how far a rod will bend. They determine the strength-to-mass ratio of each material.

Concepts

weight, measurement, aviation, building materials, airplanes, strengths, properties of metals, physical properties, technology resources

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Additional Tags

airplanes, strength, strength-to-weight ratio, weight

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Instructional Ideas

• Use in conjunction with the weight force lesson
• Have the class determine the density of each rod and find the strength versus density

Classroom Considerations

• Requires several rods of different materials

Pros

• Provides descriptions of possible extensions
• Includes things to be aware of when setting up the activity

Cons

• Confuses weight and mass in the table

Common Core

6.RP.A.1 6.NS.B.2 6.NS.B.3 6.SP.B.4