Ask a New Question
Menu

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

1 and 4
1 and 4

1 and 2
1 and 2

2 and 4
2 and 4

2 and 3

1 answer

To determine which changes shown in the table are physical changes, we look for the characteristics of a physical change:

  • A physical change does not involve a reaction with another substance (it typically does not produce a new substance).
  • In a physical change, the temperature change, production of gas, sound, or light may occur, but no new substances are formed.

From the table:

  • Change #1: Reacts with another substance (yes), new substance formed (yes) - This is a chemical change.
  • Change #2: Reacts with another substance (no), new substance formed (no) - This is likely a physical change.
  • Change #3: Reacts with another substance (yes), new substance formed (yes) - This is a chemical change.
  • Change #4: Reacts with another substance (no), new substance formed (no) - This is also a physical change.

Based on this analysis, the changes that are physical changes are:

2 and 4

So the correct response is 2 and 4.