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In this activity, learners touch supercooled water drops with an ice crystal and trigger the water drops to freeze instantly.

This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection by encouraging them to formulate questions that can be answered through scientific investi

This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection through data collection and pattern recognition.

In this activity, learners use chocolate to explore how the Sun transfers heat to the Earth through radiation.