Which observation most likely indicates that only a chemical change has taken place?(1 point)ResponsesThe change cannot be reversed.The change cannot be reversed.The shape changes.The shape changes.A reaction occurs.A reaction occurs.States of matter changes.

Answer 1

A reaction occurs.

Answer 2

Which changes shown in the table are physical changes?

(1 point)
Responses

2 and 4
2 and 4

1 and 4
1 and 4

1 and 2
1 and 2

2 and 3

Answer 3

2 and 4

Answer 4

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 5

Only a phase change occurs.