finishing

Pure substance: A substance that has definite physical and chemical properties

Heterogeneus mixture: One that does´t have a uniform composition

Homogeneus mixture: Have a uniform composition

Suspensions: is a heterogeneous mixture containing solid particles that are sufficiently large for sedimentation. 

Solutions: Solution is a homogeneus mixture composed of only one phase. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.

Colloids: Is a substance microscopically dispersed throughout another substance.

Lesson 5

Solid: Sustance that has a definite shape and volume.

Liquid: Substance that has a definite volume but not a definite shape.

Gas: Doen´t has a definite volume or shape.

Melting:Process which a solid becomes a liquid


Freezing: Liquid to become a solid.

Condensation: Reverse of evaporation.
Sublimation:Change from a solid state directly into a gas 
Deposition: Change in state from a gas directly to a solid