Changes in Matter

• Evaporation

  -A change when liquid turns to gas
• Condensation

  -When gas turns into liquid
• Melting

  -When solid turns to liquid
• Freezing

  -When liquid turns to solid
• Deposition

  -When Gas turns to solid
• Sublimination

  -When solid turns to gas
• Physical Properties: - A characteristic of a substance that can be observed or measured without changing the identity of the substance EXAMPLES: Mass, volume, color, density, boiling point
• Chemical Properties: -Describe the ability of a substance to undergo a chemical change. EXAMPLES: Flammability, Reactivity, type of chemical bonds.
• Particle Nature of Matter -Matter is made up of tiny particles. -Particles of matter are moving all the time. -These particles have spaces between them. -The particles of matter attract each other
• Solid: -has a definite shape and volume.

  -The particles or molecules are compact and close together

  -The particles are held by very strong force of attraction.
• Liquid: -No definite shape but has a definite volume

  - The particles or molecules are able to move or slide over each other.

  -Has force of attraction between is stronger than those in gases.
• Gas: -No definite shape and volume. -The particles or molecules are farthest away from each other thus, they can move faster at random directions. -The particles are held together by very weak. force of attraction.
• Strongest energy in three states of matter:

  -Gas
• Weakest energy in three state of matter:

  -Solid
• Medium energy in three state of matter:

  -Liquid
• Matter - Is anything that occupies space and has mass.
• Three different forms/states: Solid, Liquid, Gas
• volume: A measure of the space occupied by a sample of matter
• Mass: A measure of the amount/gravity of matter in a body/object