Question

Which observation most likely indicates that only a chemical change has taken place?(1 point)
Responses

The change cannot be reversed.
The change cannot be reversed.
A reaction occurs.
A reaction occurs.
The shape changes.
The shape changes.
States of matter changes.
Answer
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 3
2 and 3
2 and 4
2 and 4
1 and 4
1 and 4
1 and 2
Answer
Why is it a physical change to freeze water?(1 point)
Responses

A temperature change occurs.
A temperature change occurs.
Heat is released during the process.
Heat is released during the process.
Only a phase change occurs.
Only a phase change occurs.
The new and original substances are different.
The new and original substances are different.
Answer
Which option is an example of a chemical change?(1 point)
Responses

folding paper
folding paper
stretching a rubber band
stretching a rubber band
burning wood
burning wood
chopping vegetables
Answered by GPT 3.5
A reaction occurs.
Answered by GPT 3.5
2 and 4
Answered by GPT 3.5
Only a phase change occurs.
Answered by GPT 3.5
Burning wood