Use the table of observed changes to answer the question.

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

1 and 4
1 and 4

2 and 4
2 and 4

2 and 3
2 and 3

1 and 2
1 and 2
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Answer 1

To determine which changes are physical changes, we need to identify changes that do not result in the formation of a new substance.

From the table:

• Change 1: Reacts with another substance? Yes; New substance formed? Yes (not a physical change)
• Change 2: Reacts with another substance? No; New substance formed? No (this is a physical change)
• Change 3: Reacts with another substance? Yes; New substance formed? Yes (not a physical change)
• Change 4: Reacts with another substance? No; New substance formed? No (this is a physical change)

Based on this analysis, the changes that are physical changes are Change 2 and Change 4.

So, the correct response is:

2 and 4.