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This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air.

$1 - $5 per group Ages 4 - 18 10 to 30 minutes
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By participating in a seed scavenger hunt, learners examine many adaptations of seeds, including how many seeds a plant makes, how those seeds travel to new locations, and what protects them from pred

$1 - $5 per group Ages 8 - 18 45 to 60 minutes