IB+MYP+9.1+The+States+of+Matter

=IB MYP Thermal Physics= Go back to Sec 3 and 4 Contents Page

WILT:

Describe the difference between boiling and evaporation
>> Boiling aluminum can experiment

The kinetic model of matter
- Normally hard and rigid ; a large force is needed to change its shape - High density - Incompressible ||< Closely packed together, usually in a __r egular __ pattern, occupying __m inimum __ space __ High __ density ||< Vibrate about fixed positions Held in position by very strong intermolecular bonds >>explain why solids have __ fixed __ volumes and shapes || - High density - Incompressible ||< Randomly arranged with the particles slightly further apart as compared to that of solid. __ R elatively __ __ high __ density ||< Free to move about but confined within the vessel containing it. Have attractive forces between particles >>explain why liquids have fixed __ volume __ but will take the shape of vessels containing them. || - Low density - Compressible ||< Very far apart. Particles are randomly arranged and will occupy any available space. __ Low __ density Gases are highly __ c ompressible. __ || Table 9.1 and 9.2 pg.155
 * < State of matter ||< Model ||< Properties ||< Arrangement of particles ||< Movement of particles ||
 * < Solid ||< Draw molecular structure ||< - F ixed shape and volume
 * < Liquid ||< Draw molecular structure ||< - Fixed volume but does not have a fixed shape
 * < Gas ||< Draw molecular structure ||< - No fixed shape or volume
 * Particles exert a __ p ressure __ on their container.** ||< Particles have very__  l ittle __ attraction between them and move about __r andomly __ at a very __ high __ speed >> explain why gases have no __ fixed __ v __ olume __ and __ shape __

Homework Research >> Evidence of molecular motion / Effects of temperature on molecular motion

====Aim: Students should be familiar with the terms **melting, freezing, evaporating, boiling and condensing** and should be able to describe each in terms of the changes in molecular potential and random kinetic energies of molecules.====

Condensing: It is a process of changing state from __ gas __ to __ liquid __
Sublimation: It is a process of changing state directly from the __ solid __ to the __ gaseous __ state or from the __ gaseous __ to the __ solid __ state without becoming a __ liquid __

Evaporation: It is a process of becoming a vapor at a temperature below the boiling point. This results in a cooling of the liquid.
Evaporation takes place at the __ s urface __ of a liquid, where molecules with the highest __kinetic__ energy are able to escape.

2. Takes place throughout the liquid. 3. Bubbles are formed in the liquid. 4. Temperature remains constant. 5. Thermal energy supplied by an energy source. || 1. Occurs at any temperature. 2. Takes place only at the liquid surface. 3. No bubbles are formed in the liquid. 4. Temperature may change. 5. Thermal energy supplied by the surroundings. ||
 * = **Boiling** ||= **Evaporation** ||
 * 1. Occurs at a fixed temperature.

EVAPORATION vs CONDENSATION media type="file" key="Evaporation and Condensation.flv" width="204" height="117"

Methods of Heat Transfer
Conduction media type="file" key="Conduction.flv" width="202" height="116"

Convection media type="file" key="Convection.flv" width="200" height="116"

Radiation

= Water Cycle = media type="youtube" key="8OtTgz-UTCA" width="448" height="251" Bill Nye The Science Guy S03E07: Water cycle from youtube.com media type="youtube" key="ASLUY2U1M-8" width="448" height="251" [|How polarity makes water behave strangely - Christina Kleinberg] from TED Ed

 Great storm of 1987 : A single tree left standing.  Weather forecast : Butterfly effect, Chaos theory Earth's atmosphere Tricell model of atmospheric circulation IGCSE Geography from greenfieldgeography.wikispaces.com [|A blog all about weather and climate] from
 * Weather** (Read if you are interested)