Question

Physical vs. Chemical Change Quick Check
2 of 42 of 4 Items
Question
Use the table of observed changes to answer the question.

Change # Reacts with another substance? Temperature change? Gas, sound, or light produced? New substance formed?
1 yes yes yes yes
2 no yes yes no
3 yes yes yes yes
4 no no no no
Which changes shown in the table are physical changes?

(1 point)
Responses

2 and 4
2 and 4

2 and 3
2 and 3

1 and 2
1 and 2

1 and 4
1 and 4
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Answer 1

To identify which of the changes in the table are physical changes, we need to remember that physical changes do not result in the formation of new substances.

From the table:

- **Change 1**: Reacts with another substance (yes), temperature change (yes), gas, sound, or light produced (yes), new substance formed (yes) - This is a **chemical change**.
- **Change 2**: Reacts with another substance (no), temperature change (yes), gas, sound, or light produced (yes), new substance formed (no) - This is a **physical change**.
- **Change 3**: Reacts with another substance (yes), temperature change (yes), gas, sound, or light produced (yes), new substance formed (yes) - This is a **chemical change**.
- **Change 4**: Reacts with another substance (no), temperature change (no), gas, sound, or light produced (no), new substance formed (no) - This is also a **physical change**.

Thus, the changes that are physical changes are **Change 2 and Change 4**.

So the correct answer is: **2 and 4**.