REVISITING NEWTON’S LAWS
© Boardworks Ltd 2003 KS4 Earth and Beyond. © Boardworks Ltd 2003 What we once thought…… I don’t think so!!! Copernicus.
Reviewing Bonding My turn: Polyatomic ions are ionic compounds made from more than one atom. Ionic compounds are electrically neutral. The subscript numbers.
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.
