Physical And Chemical Changes
By Brant McLemore
Physical Change
- The physical property of a substance change, but the identity of the substance does not change.
- Examples:
- Changing from one state of matter to the next. ( Ice melts to liquid, liquid boils to gas.
- Melting 0 degrees C, and Boiling Point 100 degrees C.
- Slicing bread, melting ice and mowing grass
Physical Properties
- Any characteristics of a material that can be observed or measured without changing the identity of the material.
Examples:
- Color and shape
- Length and mass
- Volume and density (d=m/v
Chemical Change
- A change in the identity of the substance due to the chemical properties of that substance.
Examples:
- Flammability ( fire burning to ash )
- Reacts with oxygen ( food rotting )
- Heat and light
- Electricity ( water can be broken down with electricity )