Daily Agenda Catalyst #1 – Give an example of each: a solid, a liquid, a gas Seat/group changes Start Unit 2 – Properties of Matter Notes w/ States of Matter ppt

Chemistry The study of matter – its composition, structure, properties, and reactivity The study of EVERYTHING around us!

Matter Anything that has mass and takes up space. Anything that has a weight on Earth (weight includes the force of gravity)

The Atom The smallest unit of matter We can’t see individual atoms – they’re too small! We can see large groups of atoms together!

States of Matter Three different states: solid, liquid and gas How they differ in behavior: – How far apart atoms are spaced – How fast the atoms move – Volume (how they take up space) – Shape – Compressible/expandable

Solid Solid Tightly packed matter not much movement Holds its own shape Definite volume Not compressible Not much expansion when heated

Liquid Liquid Matter less closely packed than solid moves a little Takes shape of container Definite volume Not compressible Slight expansion upon heating

Gas Gas Matter is spaced out moves quickly Takes shape of container Fills volume of container (not definite) Easily compressible Easily expandable

Examples: For the following examples: – Hold up 1 finger for a SOLID – Hold up 2 fingers for a LIQUID – Hold up 3 fingers for a GAS 1. Helium in a balloon 2. Gasoline 3. Jello 4. You GAS! LIQUID! SOLID! ALL THREE!

State of matter Particle diagram Atom spacing Atom movement Definite shape Definite volume Compressible Expandable Solid Tightly packed Not much yes no LiquidGas Loosely packed A little no yes no Far Apart A lot no yes

States of Matter Foldable Get a blank, white sheet of paper… 1.Fold it into 3 sections 2.Label the sections SOLID, LIQUID, and GAS 3.In each section, for each state of matter: List its properties (definite volume, particles, etc.) Draw its particle diagram (what the atoms look like) Draw and label at least one real-life example