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 2
1 and 2

2 and 4
2 and 4

1 and 4
1 and 4

2 and 3

Answer 1

Physical changes are typically characterized by changes in state or appearance that do not result in the formation of new substances. Based on the information in 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 could be 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 could also be a physical change)

From this analysis, changes #2 and #4 are the only options that indicate no new substances are formed, suggesting they are physical changes.

Therefore, the correct response is:

2 and 4.