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The top documents tagged [nearby matter]
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nearby matter
© Boardworks Ltd 2003 KS4 Earth and Beyond. © Boardworks Ltd 2003 What we once thought…… I don’t think so!!! Copernicus.
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Reviewing Bonding My turn: Polyatomic ions are ionic compounds made from more than one atom. Ionic compounds are electrically neutral. The subscript numbers.
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Before cyanobacteria, Earth’s atmosphere had no oxygen and there was no ozone layer to protect organisms from the sun’s rays. When cyanobacteria came.
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