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What Molecules Make the Holes in Bread?
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In this activity, learners will discover why there are holes in bread.
Convection Current
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In this activity, learners make their own heat waves in an aquarium.
What Does Life Need to Live?
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In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).
Runaway Runoff
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When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.
Dip Dip, Hooray
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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.
Water Treatment
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Water treatment on a large scale enables the supply of clean drinking water to communities.
Clear Water, Murky Water
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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?