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

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 determine which changes are physical changes, we need to look for changes that do not involve the formation of new substances.

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 (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 (physical change)

Therefore, the changes shown that are physical changes are 2 and 4.

So, the correct response is:

2 and 4