Physical vs. Chemical Change Quick Check

Question

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
Skip to navigation

Answer 1

To determine which changes shown in the table are physical changes, we need to look at the characteristics of each change:

1. Change #1: Reacts with another substance? Yes; Temperature change? Yes; Gas, sound, or light produced? Yes; New substance formed? Yes - This indicates a chemical change.

2. Change #2: Reacts with another substance? No; Temperature change? Yes; Gas, sound, or light produced? Yes; New substance formed? No - This indicates a physical change, as no new substance was formed.

3. Change #3: Reacts with another substance? Yes; Temperature change? Yes; Gas, sound, or light produced? Yes; New substance formed? Yes - This indicates a chemical change.

4. Change #4: Reacts with another substance? No; Temperature change? No; Gas, sound, or light produced? No; New substance formed? No - This indicates a physical change, as well.

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

Correct Response: 2 and 4.