Solids liquids gases

• What three forms can water exist in?

  Solid, liquid, and gas
• What is solid water commonly known as?

  Ice
• What is gaseous water commonly known as?

  Steam
• What is a particle?

  A single piece of matter
• What three things can particles be?

  Atoms, molecules, or ions
• How are particles arranged in a solid like a brick?

  Regularly arranged and touching
• How do particles move in a solid?

  By vibrating
• Why do solids have a fixed shape?

  Particles are regularly arranged and touching
• How are particles arranged in a liquid like water?

  Randomly arranged
• How do particles move in a liquid?

  Freely over each other
• Why can liquids be poured?

  Particles move freely over each other
• How are particles arranged in a gas like helium?

  Widely spaced apart
• How do particles move in a gas?

  Quickly in random directions
• What determines the motion of gas particles?

  Colliding with each other or walls
• What is the arrangement of particles in a solid?

  Tightly packed and ordered
• How do particles move in a solid?

  Vibrate in a fixed position
• How do particles move in a liquid?

  With random motion
• How do particles move in a gas?

  Rapidly in all directions
• What is force in chemistry?

  Attraction/repulsion between two particles
• Why can't solids be compressed or squashed?

  Particles are very close together
• What determines whether a solid can flow?

  Fixed shape prevents flowing
• What happens to particles in a solid when heated?

  They vibrate faster
• Why do solids expand when heated?

  Particles vibrate more and move apart
• What happens to the size of the particles when a substance is heated?

  Particles do not get bigger
• How are particles arranged in liquids?

  Randomly and close together
• Why can liquids flow and be poured?

  Particles can move around each other
• Why can't liquids be compressed or squashed easily?

  They are mostly touching
• Why is sand a solid even though it can be poured?

  Each grain has a fixed shape
• How are particles arranged in gases?

  Widely spaced and randomly arranged
• Why can gases be easily compressed or squashed?

  Particles are widely spaced
• How do particles move in gases?

  Quickly in straight lines
• What is the behaviour of gas particles?

  Colliding with each other and walls
• What exists between gas particles?

  Empty space
• Why is helium gas used inside party balloons?

  It's lighter than air
• What is an atom?

  Smallest particle of an element
• What is almost everything made of?

  Particles
• What is a molecule?

  Two or more bonded atoms
• What is an ion?

  Charged atom or molecule
• What are models in science?

  Representations explaining concepts
• What is the particle model?

  Diagrams of solids, liquids, and gases