Question

use the table of observed changes to answer the question.indicators of chemical versus physical changes

which changes shown in the table are physical changes?
(1 point)
1 and 2
1 and 4
2 and 4
2 and 3

Explanation:

A physical change is a change in which no new substance is formed. Looking at the table:

• For change #2: It does not react with another substance and no new substance is formed.
• For change #4: It does not react with another substance, no temperature change (though temperature change can also be physical in some cases like melting which is physical), no gas/sound/light produced and no new substance formed.

Answer:

2 and 4