Change

Question

#
Reacts with
substance?
another
Temperature change?
Gas, sound, or light produced
1
yes

yes
yes
2
no

yes
yes
3
yes

yes
yes
4
no

no
no
Which changes shown in the table are physical changes?
(1 point)
• 2 and 4
• 2 and 3
• 1 and 2
• 1 and

Answer 1

In the table you provided, physical changes are typically characterized by changes that do not involve a change in the substance's chemical composition, such as changes in state (e.g., melting, freezing).

Looking at the information in the table:

• Change 1: Reacts with substance? Yes; Temperature change? Yes; Gas, sound, or light produced? Yes. (This indicates a chemical change.)
• Change 2: Reacts with substance? No; Temperature change? Yes; Gas, sound, or light produced? Yes. (This indicates a physical change due to the temperature change.)
• Change 3: Reacts with substance? Yes; Temperature change? Yes; Gas, sound, or light produced? Yes. (This indicates a chemical change.)
• Change 4: Reacts with substance? No; Temperature change? No; Gas, sound, or light produced? No. (This indicates a physical change but may also imply no significant change at all.)

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

Therefore, the correct answer is: • 2 and 4.