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Chapter Ten Lenses part 4
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Chapter ten Lenses part 3.
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Chapter ten Lenses part 2.
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Chapter ten Lenses part 1.
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Chapter Nine Source and effects of heat energy part 4
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Chapter Nine Source and effects of heat energy part 3
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Chapter Nine Source and effects of heat energy part 2
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Chapter Nine Source and effects of heat energy part 1.
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Chapter eight Measurement of Physical quantities part 2
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Chapter eight Measurement physical quantities part 1
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Chapter Seven Force and Pressure part 3
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Chapter Seven Force and Pressure part 2
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Chapter Seven Force and Pressure part 1
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Chapter Six Acids Alkalis and salt part2
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Chapter six Acids Bases and Alkalies part1.
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Chapter four Pultant and their Environment
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Chapter Five Chemical Reaction part 1
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Chapter Two Heredity in Organism.
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Chapter Three Biotechnology Part 2
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Chapter Three Biotechnology Part 1
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Chapter One Human Organ System part1.
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Chapter Twleve Investigating the Space part4
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Chapter Twleve Investigating the Space part3
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Chapter Twleve Investigating the Space part 2
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Chapter Twleve Investigating the Space.
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