Science 8

• Matter

  -is anything that occupies space and has mass.
• Solid,Liquid,Gas

  -The three states of matter.
• Solid

  -has definite shape and volume.

  -has low compressibility,high density,and does not flow

  easily.
• Liquid

  -has no definite shape but has a definite volume.

  -has low compressibility,lower density,and flow easily.
• Gas

  -Has no definite shape and volume.

  -has high compressibility,very low density,and flow easily.
• Plasma

  -considered as the 4th state of matter.
• Phase change

  -the process of changing from one physical condition to

  another.
• Melting

  -When solid becomes liquid.
• Freezing

  -When liquid becomes a solid.

  -also called a solidification.
• Evaporation

  -When liquid turns into gas.
• Condensation

  -When gas turns into liquid.
• Sublimation

  -When solid turns into gas.
• Deposition

  -When gas turns into solid.
• Physical change

  -changes only the appearance of a substance,

  not it's chemical composition.
• Chemical change

  -can cause a substance to change into an entirely

  substance with a new chemical formula.
• Melting,Freezing,Evaporation,Condensation,Sublimation,

  Deposition.

  -The 6 types of phase change.
• Boiling point

  -takes place at or above the substance.