Physical Science MS-PS1-1 Model atomic composition of molecules. MS-PS1-2 Analyze signs of a chemical reaction. MS-PS1-5 Model conservation of mass. Life Science MS-LS1-6 Explain the role of photosynthesis in cycling of matter and energy in and out of organisms. MS-LS2-2 Model interactions among organisms (abiotic factors, predation, competition, symbiosis, etc.) Earth Science MS-ESS2-2 Explain geologic processes and changes in Earth's surface (plate tectonics, volcanoes, earthquakes). MS-ESS3-2 Interpret data for predicting and preparing for natural disasters. ES-ESS2-1 Model rock cycle; weathering, erosion, and deposition.