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"Composition of Air" PPT courseware on the composition of air and matter
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"Identifying the Elemental Composition of Matter" PPT courseware on the composition of air and matter
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"Identifying the Elemental Composition of Matter" PPT courseware on the composition of air and matter 2
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"Particles constituting matter (Ⅱ) - atoms and ions" PPT courseware on the composition of air and matter
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"Particles constituting matter" The composition of matter PPT courseware 2
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"Elements Composing Matter" PPT courseware on the composition of matter
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"Structure of Atom" PPT courseware on the mystery of matter composition
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"Composition of Air" Air around us PPT
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"Structure of Atom" The Mystery of Material Composition PPT Courseware 6
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"Structure of Atom" The Mystery of Material Composition PPT Courseware 5
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"Structure of Atom" The Mystery of Material Composition PPT Courseware 2
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"Structure of Atom" The Mystery of Material Composition PPT Courseware 3
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"Structure of Atom" The Mystery of Material Composition PPT Courseware 4
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"Molecular" PPT courseware of particles that constitute matter
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"Elements" The Mystery of Material Composition PPT Courseware
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"Method of Representing the Composition of Pure Substances" PPT courseware on the composition of matter
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"Expressions of the Composition of Matter" The gas that sustains life - Oxygen PPT courseware
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"Method of Expressing the Composition of Pure Substances" Composition of Matter PPT Courseware 2
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"Expressions of the Composition of Matter" The gas that sustains life - Oxygen PPT courseware 3
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"Elements" The Mystery of Material Composition PPT Courseware 2
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"Elements" The Mystery of Material Composition PPT Courseware 7
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"Molecular Composition of Matter" Heat and Energy PPT Courseware
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"Elements" The Mystery of Material Composition PPT Courseware 6
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"Elements" The Mystery of Material Composition PPT Courseware 9
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"Elements" The Mystery of Material Composition PPT Courseware 3
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"Elements Composing Matter" PPT
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"Properties of Oxygen" Mystery of Air PPT Courseware
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"The Surrounding Air" Air PPT Courseware
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"Representation of Material Composition" PPT of the Air Around Us (Lesson 2)
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"Representation of Composition of Matter" PPT of the air around us (Lesson 1)
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"Molecular Composition of Matter" Heat and Energy PPT Courseware 2
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"Composition of Air" PPT courseware on the composition of air and matter
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"The Surrounding Air" Air PPT Courseware
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"Molecular Composition of Matter" Heat and Energy PPT Courseware 2
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