Physical & chemical changes
Any characteristic of a material that can be obsverved or measured without changing the identity of the material.
color and shape
The physical properties of a substance changes,but the of the substance does not change.
- Changing from one state of matter to the next
- Melting 0 degrees C and boiling point 100 degrees
- slicing bread, melting ice ,mowing lawn
Any charactistic that gives a substanc the abiliy to undergo a change that results in anew substance.
- reacts wih oxygan
- reult with light
A change inthe identitty ofa sudstance due t ohe chemical properties of that substant
- reacts with oxygen
- heat & light
Law of conservation of mass
The mass of what you end with is always the same as the mass of what you start with