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Presentations and games!!!

Great website about matter for you kids:

Changes in matter.

There are two kinds of changes in matter:

- Physical changes.
- Chemical changes.

Physical changes: The matter is the same before and after the change. There is a change in physical properties ( size, smell or colour).

Chemical changes: a material or substance is changed into another one. The change is not reversible, the material or substance is different after this type of change.