Engineering, 04.02.2021 22:40, marieroberts7148

Ethan is observing and measuring the properties of a substance. He heats the substance and observes that the substance turns from a brown solid to a black powder. He then measures the properties of the black powder and compares them to the properties of the brown solid. He finds that the properties of the brown solid and black powder are different. Which option below best summarizes Ethan's observation?
The brown solid changed color and size when he added heat, which means he observed a physical change.
The brown solid became a new substance when he added heat, which means he observed a physical change.
The brown solid became a new substance when he added heat, which means he observed a chemical change.
O The brown solid changed color when he added heat, which means matter was destroyed by a chemical change.

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Ethan is observing and measuring the properties of a substance. He heats the substance and observes...