Homework Help: science

Posted by stan on Thursday, December 14, 2006 at 7:27pm.

Describe the identifiable physical properties of substances and explain how changes in these properties can occur without changing the chemical nature of the substance.

Mass &
density are 2 properties of matter.
When water freezes it expands making it less dense yet it is still water.
When iron is heated it expands until it's a liquid; at that point it is less dense, yet it is still iron.

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