Determine whether each observation describes a chemical or a physical property
1. When a piece of Sodium metal is placed in a test tube with water, the Sodium fizzes and
bubbles of gas are produced.
2. When salt is added to water in a test tube, the salt dissolves.
3. When water is placed in a freezer at zero degree selcious it becomes ice.
4. When an iron bicycle is left outdoors and is exposed to moist air, it gets rusty.