Matter is conserved regardless of the type of change that occurs when heating, cooling, or combining substances.

• Analyze and interpret data to make sense of phenomena, using logical reasoning, mathematics, and/or computation.

• Identify the evidence that supports particular points in an explanation.

• Compare and refine arguments based on an evaluation of the evidence presented.

• Distinguish among facts, reasoned judgement based on research findings, and speculation in an explanation.

• Respectfuly provide and receive critiques from peers about a proposed procedure, explanation, or model by citing relevant evidence and posing specific questions.

• Construct and/or support an argument with evidence, data, and/or a model.

• Organize simple data sets to reveal patterns that suggest relationships.

• Describe, measure, estimate, and/or graph quantities (e.g., area, volume, weight, time) to address scientific and engineering questions and problems.

• Students learn matter is made of particles and energy can be transferred in various ways and between objects. Students observe the conservation of matter by tracking matter flows and cycles before and after processes and recognizing the total weight of substances does not change.

• Students recognize natural objects and observable phenomena exist from the very small to the immensely large. They use standard units to measure and describe physical quantities such as weight, time, temperature, and volume.

• Because matter exists as particles that are too small to see, matter is always conserved even if it seems to disappear. Measurements of a variety of observable properties can be used to identify particular materials.

• Chemical reactions that occur when substances are mixed can be identified by the emergence of substances with different properties; the total mass remains the same. - Chemical reactions that occur when substances are mixed can be identified by the emergence of substances with different properties; the total mass remains the same.