9. The Grade 4 Science class heated the materials in their activity. They have observed changes in the appearance of the materials. What do you call these changes?
A. chemical change
B. physical change
C. climate change
D. No change at all
nonsense or report
A. chemical change
B. physical change
C. climate change
D. No change at all
nonsense or report
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Answer:
B. Physical change
Explanation:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.