Matters generally exists in the four forms of solid, liquid, gas and plasma.
- Solids are tightly packed, usually in a regular pattern.
- Solids has a stable, definite shape and volume.
- Solids can only change their shape by force, as when broken or cut.
- Example: Bar of steel and dry ice ( solid carbondioxide )
- Liquids are close together with no regular arrangement.
- Liquids has a definite volume, but takes the shape of its container.
- Example: Water and Oil.
- Gas are well separated with no regular arrangement.
- Compressible fluid.
- Gas has no definite volume and shape.
- Example: Hydrogen and Oxygen.
- Plasma does not have definite shape or volume.
- Plasma may be formed by heating and ionizing gas.
- Examples: Lightning, Electric sparks, and Fluorescent lights.
- At very high temperature of stars, atoms lose their electrons. The mixture of electrons and nuclei that results is the plasma state of matter.