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A school of fish: Making a seismograph | Earth science projects, Seismograph, Preschool science activities
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USGS on Twitter: "Build your own model seismograph at home! What do you need? Find it all right here (PDF): https://t.co/39I2ZOLDlQ #earthquakes #education https://t.co/7XZAPuc9Mm" / Twitter
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American Educational Seismograph Model: Science Classroom Measurement Kits: Amazon.com: Industrial & Scientific
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