Physical Versus Chemical Changes
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Objective
I can distinguish between physical and chemical changes by identifying their key characteristics.
Part 1 of 4
Warm-up video
Next Generation Science · 10:40
We don't generate video — this one is by Next Generation Science 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
In a physical change, the form or state of matter changes, but the molecular structure remains the same, and no new matter is made.
- 2
A chemical change involves a transformation at the molecular level where the original substance turns into a different substance with new properties.
- 3
Indicators that a chemical change has occurred can include a change in color, the production of gas, or the formation of a precipitate.
Part 3 of 4
Practice
7 questions
What is the fundamental difference in the molecular structure of a substance when it undergoes a physical change versus a chemical change?
Imagine you are making a smoothie. You put fruits, yogurt, and ice into a blender and blend them until smooth. Is this an example of a physical change or a chemical change? Explain your answer.
Part 4 of 4
Exit ticket
Quick comprehension check
“When iron is exposed to oxygen and moisture, it undergoes a transformation resulting in the formation of rust. Is this a physical or chemical change? Justify your answer by describing the key characteristics that classify it as such.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
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