Changes around us
Physical and Chemical Changes
|
| Physical Properties |
- A characteristic of a pure substance that can be observed without changing it into another substance, any characteristic of a material that you can observe without it changing the identity of the substances that make up the material.
- Includes color, shape, mass, Length, Volume, and densty
|
| Physical Changes | In this change the properties of a substance change, but the identity of the substance does not. |
| Chemical Properties | Any characteristic that gives a substance the ability to undergo a change that results in a new substance. |
| Chemical Changes |
- A change in the identity of a substance due to the chemical properties of that substance
- A new substance or substances are formed as a result of such a change.
- Something that can't be reversed.
|
| Difference Between Chemical and Physical Properties |
- A physical property is any aspect of substance that can be measured or perceived without changing it.
- A chemical property, on the other hand, can only be observed by changing a substance's chemical identity.
|
|
- . A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed,
- whereas the burning of wood is a chemical change - you can't 'unburn' it
|
