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In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.

free Ages 14 - 18 1 to 2 hours
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In this activity, learners estimate how much water they think can be found in various locations on the Earth in all its states (solid, liquid, and gas) to discover the different water ratios in the Ea

free Ages 6 - 14 10 to 30 minutes