Motion - 1 & 2 Dimesions & Motion Graphs


Gases behave very differently from solids and liquids. The behavior of gases can be explained by kinetic molecular theory (KMT). An ideal gas is a gas that obeys 5 postulates of KMT.

  • Gas particles are very small - so small that we can count their volume as zero. A gas is mostly just empty space
  • Gas particles are in contant random straight-line motion, obeying Newton's laws, and only changing direction when they impact other particles or the walls of their containers.
  • Collisions between gas particles are perfectly elastic, meaning that no kinetic energy is lost in those collisions.
  • Gas paricles do not interact with each other except when they collide. There are no attractive or repulsive forces between them.
  • The temperature of a gas is directly related to the average kinetic energy of the gas particles. As the particles speed up, the average kinetic energy increases as does the temperature.

Practice Worksheets, PowerPoints & Videos

Intro To Gas Laws Worksheet (and the KEY)

PhET Simulation about gas molecules (requires Java)

Gas Properties
Click to Run


The practice workshsheets above are original and have keys available. Also available are links to resources on other sites, including simulations and videos produced by others
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