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Battling for Oxygen

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Tweens use oxygen and ozone models -- constructed from gumdroms and toothpicks -- to show the dynamic interactions of Earth's protective ozone layer, the sun's UV radiation, and harmful human-made CFCs (chlorofluorocarbons).

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Battling for Oxygen

Battling for Oxygen

Tweens use oxygen and ozone models -- constructed from gumdroms and toothpicks -- to show the dynamic interactions of Earth's protective ozone layer, the sun's UV radiation, and harmful human-made CFCs (chlorofluorocarbons).