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Water Underground
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Many people get water from a source deep underground, called groundwater.
Turning the Air Upside Down: Convection Current Model
Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water.
Multifactorial Inheritance
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In this biology activity (page 6 of the PDF), learners roll a die to create a simple model that teaches them about the factors contributing to heart disease.
Turbidity
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This is an activity about turbidity, or the amount of sediment suspended in water.