Question

describing changes of matter
you are comparing a reaction that produces a chemical change and one that produces a physical change. what evidence could you use to determine which type of change is occurring?

Explanation:

For a chemical change, evidence includes formation of a new substance, color - change, production of gas, or heat release/absorption. For a physical change, evidence is change in state (solid - liquid - gas), shape, or size without new substances being formed.

Answer:

For a chemical change: formation of new substances, color changes, gas production, heat or light release/absorption. For a physical change: change in state, shape, or size without new substance formation.