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"Changes of Baking Soda and White Vinegar" PPT courseware on changes in substances
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"Image Problems in the Change of State of Matter" PPT on Change of State of Matter
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"Where Do Water Drops Come From" Changes in Temperature and Water PPT Courseware 2
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"Where Do Water Drops Come From" Changes in Temperature and Water PPT Courseware 3
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"Where Do Water Drops Come From" Changes in Temperature and Water PPT Courseware 3
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"Where Do Water Drops Come From" Changes in Temperature and Water PPT Courseware 2
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"Water Frozen" Changes in the Four Seasons PPT Courseware 2
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"Temperature and Thermometer" Changes in Temperature and Water PPT
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