Topic 3 (particle model of matter)

• How did Robert Brown test Brownian motion?

  He put pollen molecules into water to observe their random movement.
• What is Boyle’s law?

  Pressure is indirectly proportional to the volume
• How to calculate pressure?

  Force/Area
• How does evapouration of a liquid cause the temperature of the remaining liquid to decrease?

  Kinetic energy causes atoms to move

  when atoms are given enough energy they change state

  the atoms that have enough thermal energy evapourate leaving the cooler atoms with less energy in the container