Question
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.
Answers
Answer
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
(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
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.
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.
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