Target 1-3 Thursday, September 21, 2017 States of Matter Target 1-3 Thursday, September 21, 2017
Kinetic Particle Theory Kinetic Particle Theory: The idea that the states and behaviors of matter are caused by the energy/movement of particles (atoms and molecules) Theory = the best idea we have based on the evidence available to us
Kinetic Energy Kinetic Energy: the energy a particle or substance has because of its movement More kinetic energy = more movement If a substance gets more kinetic energy, the particles will move faster and spread out
Solids Lowest kinetic energy Particles are packed tightly together Particles vibrate in place but do not move Particles are packed tightly together Fixed shape (cannot change) Fixed volume (cannot change)
Liquids More kinetic energy than solids Particles vibrate and also slide past each other We say the liquids can “flow” No fixed shape (will change to take the shape of their container) Fixed volume (cannot change)
Gases Highest kinetic energy Particles are spread far apart Particles are in constant motion in all directions Particles hit and bounce off each other and the walls of their containers Particles are spread far apart No fixed shape (will change to take the shape of their container) No fixed volume (will always fill their container)