Summary
Ralphie's robot has no moving parts, so the class shrinks inside an arm to see how real bodies move. They discover how muscles and bones work together.
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Teaching resources
Discussion questions
Discussion
Ralphie's robot has no moving parts, so the class shrinks inside an arm to see how real bodies move.
- What has to happen for your arm to bend?
- Why do muscles often work in pairs?
- What do joints let your body do?
Quick work-a-long
Vocabulary: muscle, bone, joint.
Try it: Bend your arm and describe which parts pull to make it move.