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Hot Equator, Cold Poles
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In this activity, learners use multiple thermometers, placed at different angles, and a lamp to investigate why some places on Earth's surface are much hotter than others.
Water Underground
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Many people get water from a source deep underground, called groundwater.
Window Under Water
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Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.