Which of the following is an example of a physical change?
A) Smell
B) Gas bubbles
C) Release of heat
D) Creation of new substance
Answer: A
Explanation: A) Correct. During a physical change, the physical properties of a substance, such as how it looks, smells, or feels, can change.
B) Incorrect. Chemical changes often can be identified by changes in color or odor, production of gas bubbles, release or absorption of heat, or creation of a new substance with different properties.
C) Incorrect. Chemical changes often can be identified by changes in color or odor, production of gas bubbles, release or absorption of heat, or creation of a new substance with different properties.
D) Incorrect. Chemical changes often can be identified by changes in color or odor, production of gas bubbles, release or absorption of heat, or creation of a new substance with different properties.
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