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develop a model to communicate that matter is made of particles too small to be seen
measure and graph quantities to provide evidence that the total mass of matter is conserved regardless of the type of change that occurs when heating, cooling, or mixing substances
observe and record qualitative and quantitative evidence to support identification of materials based on their properties
conduct an investigation that produces quantitative and qualitative data to analyze whether the mixing of two or more substances results in new substances
use models to describe that energy in animals' food was once energy from the sun