states of matter

• which theory attempts to explain the 3 states of matter?

  particle (kinetic) theory
• are particles elastic?

  no, they are inelastic
• complete the sentence.

  in solids, strong attractive forces hold the particles in place, so that they can only _____ in position.

  vibrate
• complete the sentence

  as the substance is ______ ,the particles gain energy and _____ faster and faster

  • heated
  • vibrate
• what is it called when a solid turns into a liquid?

  melting
• when a solid is heated, energy is transferred to which of these particles' energy stores, making them vibrate faster?

  chemical

  elastic

  kinetic

  thermal

  kinetic
• what is it called when a liquid turns into a gas?

  boiling
• complete the sentence- you can use these words

  density / pressure / kinetic / volume

  if the gas is trapped within a container that cannot expand, it means that the _______ of the gas is fixed, and so the ______ inside the container increases

  • volume
  • pressure
• what is the process called when a gas turns into a liquid?

  condensation
• which state of matter has weak forces of attraction between particles?

  liquid
• which state of matter has very weak forces of attraction between particles?

  gas
• which state of matter has strong forces of attraction between particles?

  solid
• when a gas is heated, is it true that:

  if its in an expandable container, the volume will increase?

  yes its true
• is it true that:

  if, when a gas is heated, its in a fixed container, the volume will increase?

  no

  if its in a fixed container, the pressure will increase
• in a closed system, changes in state won't change the mass at all.

  why is this?

  the number of particles remain the same
• which state of matter has the lowest density?

  liquid

  gas

  solid

  gas