6th Grade Units Unit 6.1 Light & MatterĀ Unit 6.2 Thermal Energy Unit 6.3 Weather, Climate & Water Cycling Unit 6.4 Plate Tectonics & Rock Cycling Unit 6.5 Natural Hazards Unit 6.6 Cells & Systems 7th Grade Units Unit 7.1 Chemical Reactions & Matter Unit 7.2 Chemical Reactions & Energy Unit 7. 3 Metabolic Reactions Unit 7.4 Matter Cycling & Photosynthesis Unit 7.5 Ecosystem Dynamics Unit 7.6 Earth’s Resources & Human Impact 8th Grade Units Unit 8.1 Contact Forces Unit 8.2 Sound Waves Unit 8.3 Forces at a Distance Unit 8.4 Earth in Space Unit 8.5 Genetics Unit 8.6 Natural Selection & Common Ancestry