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Mr. Daley

Student Instructions

Mystery #2: Who set the first clock? - Reflection

Please complete the following questions to demonstrate your learning from the Mystery. Be sure to be specific, include details, and write in complete sentences!

5th Grade, Science
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Teacher Notes (not visible to students)

Answer Key: 1. Ancient people used shadow clocks to tell time. Without the sun, you can't use a shadow clock! 2. A shadow clock only works because the shadow moves across the dial. So if the Earth stopped spinning, the shadow clock would be useless! 3. The Sun would appear to move much more slowly across Mercury's sky than Earth's sky, because Mercury spins much more slowly than the Earth.