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

Question

Responses

A reaction occurs.
A reaction occurs.

The shape changes.
The shape changes.

The change cannot be reversed.
The change cannot be reversed.

States of matter changes.

Answer 1

States of matter changes.

Answer 2

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

Answer 3

2 and 4

Answer 4

Why is it a physical change to freeze water?(1 point)
Responses

The new and original substances are different.
The new and original substances are different.

Heat is released during the process.
Heat is released during the process.

A temperature change occurs.
A temperature change occurs.

Only a phase change occurs.

Answer 5

Only a phase change occurs.

Answer 6

Which option is an example of a chemical change?(1 point)
Responses

chopping vegetables
chopping vegetables

stretching a rubber band
stretching a rubber band

folding paper
folding paper

burning wood
burning wood

Answer 7

burning wood

Answer 8

BAAA