Monday 10/26/09

•More on Heat

•Is Air a Gas? Lab

•3 Phases of Matter

Date Activity Page

10/23 3 Phases of Matter

What will we learn today…The difference between heat and thermal energyEvidence for whether or not air is a gasDefinitions and types of particle movements in the four phases (states) of matter.

How we will learn it…

•Lab•Lecture/Writing notes•Choice Activity

MatterAnything that has mass and takes up space (has volume)Made up of different kinds of atoms

Matter is made of atoms!

The atomic model has changed throughout the centuries, starting in 400 BC, when it looked like a billiard ball

To our current Wave Model

Atomic Structure

Atoms, Heat and Temperature

Solids Liquids Gases

•Atoms are perpetually in motion.Heat is the total kinetic energy of all the atoms in an object.•Temperature is the average kinetic energy of the atoms.

Test Your KnowledgeWhich has more heat energy?

The iceberg!!!

Remember that heat is is the total kineticenergy of all the atoms in an object

The iceberg is colder, but it has way more atoms!

Notes: Difference btwn Heat and Thermal Energy

Heat: transfer of energy due to a temperature difference (conduction, convection, radiation)Thermal energy: total kinetic and potential energy of an object

Notes: SolidsParticles are tightly packed, vibrating about a fixed position. Have a definite shape and a definite volume.

Notes: LiquidsParticles are tightly packed, but are far enough apart to slide over one another. Have an indefinite shape and a definite volume.

Notes: GasesParticles are very far apart and move freely. Have an indefinite shape and an indefinite volume.

Notes: PlasmaAn ionized gas.A very good conductor of electricity and is affected by magnetic fields.Have an indefinite shape and an indefinite volume.

The negatively charged electrons (yellow) are freely streaming through the positively charged ions (blue).