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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.99-101

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.99-101

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.81-83

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.81-83

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.88-89

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.88-89

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.84-85

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.84-85

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.86-87

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.86-87

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1C_SCJ_5.3_Energy(2)_17

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1C_SCJ_5.3_Energy(2)_17

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1C_SCJ_5.3_Energy(1)_16

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1C_SCJ_5.3_Energy(1)_16

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1C_SCJ_5.3_Fossil fuel(2)_15

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1C_SCJ_5.3_Fossil fuel(2)_15

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1C_SCJ_5.3_Fossil fuel(1)_14

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1C_SCJ_5.3_Fossil fuel(1)_14

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