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Counting With Quadrants
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Millions of organisms can live in and around a body of water.
Counting Your Lucky Stars
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In this activity, learners sample a star field to estimate the number of stars in the universe.
Penny Drop
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In this quick activity about the properties of water (page 1 of PDF under SciGirls Activity: Malformed Frogs), learners will use an eyedropper to slowly place one drop of water at a time onto a penny,