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This is an activity (located on page 3 of PDF under Hockey Sticks Activity) about composites, materials made of 2 or more different components.

$1 - $5 per group Ages 8 - 14 1 to 7 days
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In this activity, learners demonstrate the effects of cold-working (strain-hardening) and annealing. Learners discover that these processes change the load that a wire can support.

$1 - $5 per group Ages 14 - adult 2 to 4 hours
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In this activity, learners explore how composites work by creating and testing their own composite for an imaginary company.

$1 - $5 per student Ages 11 - 18 4 to 24 hours
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In this activity, learners determine the elastic and plastic properties of different types of metal wires.

$1 - $5 per group Ages 14 - adult 45 to 60 minutes