Chemical and Physical Changes
11th Grade · Science · 55 min
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Learning Objective
I can differentiate between chemical and physical changes by identifying evidence of new substance formation.
- 1
A physical change alters the form or appearance of a substance, but does not change its chemical composition.
- 2
The Maillard reaction, responsible for the browning of food, is a chemical reaction between amino acids and sugars that occurs at specific temperatures.
- 3
Signs of a chemical reaction include the release of heat or light, the production of a gas, a change in color, or the formation of a precipitate.
