Changes around us
Reversible Changes
Irreversible Changes
Chemical Changes
Physical Changes
Changes are reversible- they can be reversed.
Changes are irreversible - they cannot be undone
The molecule of the object after and before the paper is the same
A chemical change, also known as a chemical reaction, is a process in which one or more substances
Examples
Examples
Examples
a new substance is not formed
A new substance is formed
Examples
The molecules of the new formed object is different