Chemical and Physical Changes
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Objective
I can differentiate between chemical and physical changes by identifying evidence of new substance formation.
Part 1 of 4
Warm-up video
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We don't generate video — this one is by Socratica on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 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.
Part 3 of 4
Practice
12 questions
True or False: A chemical change alters the chemical composition of a substance.
Which of the following is an example of a physical change?
Part 4 of 4
Exit ticket
Quick comprehension check
“Give an example of a chemical change and explain what evidence indicates that a new substance was formed.”
Sample answer included in the free materials
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