Answer: I gotchu.
The physical change occuring would be the butter melting, because the butter is still butter, but it changed from a solid to a liquid. This is not the chemical change, because you can put melted butter in the fridge and it would be solid again. The chemical change that is occuring would be toasting the bread. This is because when you toast bread, you can't untoast it. It changed, the chemical status of the bread is now toast if that makes sense. The key thing to remember here is that a physical change can be undone whereas a chemical change cannot.
Explanation:
Answer:
The 4th sentence is punctuated correctly.
According to my dentist, I need to brush my teeth for at least two minutes.
