Matter in Action Worksheet
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Matter in Action Worksheet
Case file: What happened?
The cooler tipped in the sun. An ice cube melted into water. Later, the water was put in a freezer and became ice again. A paper napkin was crumpled, but it could be flattened. A slice of bread was toasted until its colour, smell and texture changed. It could not be turned back into fresh bread. These examples show that matter can change in different ways. A reversible change can be undone to recover the original material. An irreversible change cannot easily be undone to recover it. Heating or cooling can cause a change of state, such as melting or freezing.
- The water can be cooled and frozen back into ice.
- The ice disappears and becomes a new material.
- The water cannot be collected.
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