Chemicals in our lives 2.0 / 5 based on 1 rating ? ChemistryOrganic and Green ChemistryGCSEOCR Created by: ChloeCreated on: 19-12-12 15:08 Tectonic Plates Giant slabs of rock that make up the earths outer layer 1 of 6 Convction The currents in the underlying solid mantle 2 of 6 Plate Boundaries The edges of the tectonic plates 3 of 6 Ordovician Period 450 million years ago 4 of 6 Devonian Period 360 million years ago 5 of 6 Permian Period 280 million years ago 6 of 6
Comments
No comments have yet been made