Matter Because it matters

Matter Is anything that has MASS and VOLUME!

Mass The quantity of matter that a substance or object contains

VOlume Is the space taken up by a substance or object

Solid Has definite: Shape Volume

Liquid Has definite: Volume -But no definite shape!

Gas Gas has its volume and its shape determined by its container!

Chemical change Can occur in matter when substances combine to form new substances

physical change Can occur in matter when there is a change in appearance, but NO new substances form

Particle model of matter All matter is made up of very small particles. There are empty spaces between the particles. The particles that make up matter are always moving. The particles are attracted to one another.

Kinetic molecular theory Kinetic Energy is the Energy of…. MOTION All particles are always moving, so they always have kinetic energy.

Kinetic molecular theory All matter is made up of very small particles. There are empty spaces between the particles. Particles are constantly moving. Energy makes the particles move.

Thermal changes -matter expands when its temperature increases Thermal Expansion Thermal Contraction -matter expands when its temperature increases -matter contracts (gets smaller) when its temperature decreases

Heat vs. Temperature TEMPERATURE HEAT -is the energy transferred from one material to another -the average kinetic energy of its particles

Changes of State Solid Liquid Gas

definitions Melting Evaporation Condensation Solidification (freezing) Sublimation Deposition

More definitions MELTING POINT BOILING POINT -the point at which a substance changes from a solid to a liquid -the melting point of water is 0°C -the melting point of gold is 1064°C -the point at which a substance changes from a liquid to a gas -the boiling point of water is 100°C -the boiling point of gold is 2856°C

Describing matter You can describe it quantitatively: -solubility -conductivity -viscosity -density -melting and boiling points

Describing matter You can describe it qualitatively: -state -colour -malleability -ductility -crystallinity -magnetism

Pure substances -only 1 kind of matter! Elements Compounds -a pure substance that can note be broken down into smaller simpler substances -Can you think of any elements? -pure substances that have two elements combined in a unique way. -Can you think of any compounds?