Describe solids in terms of the spacing, ordering and motion of atoms or molecules.


  1. Spacing - closely packed
  2. Arrangement - regular and ordered
  3. Motion - particles vibrate about fixed positions

Answer in your head, out loud, or on paper, then tap the card to flip.

Describe liquids in terms of the spacing, ordering and motion of atoms or molecules.

  1. Spacing - closely packed
  2. Arrangement - random and disordered 
  3. Motion - particles are able to move past one another

Answer in your head, out loud, or on paper, then tap the card to flip.

Describe gases in terms of the spacing, ordering and motion of atoms or molecules.

  1. Spacing - spread out
  2. Arrangement - random with no regular arrangement
  3. Motion - particles move freely in all directions

Answer in your head, out loud, or on paper, then tap the card to flip.

What is meant by Brownian motion?

Brownian motion is the random, irregular motion of microscopic particles suspended in a fluid due to collisions with molecules of the surrounding medium.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is formula linking internal energy (Einternal), kinetic energy (Ek) and potential energy (Ep)?

Einternal​ = Ek​ + Ep​


Einternal = internal energy (J)

Ek = kinetic energy (J)

Ep = potential energy (J)

Answer in your head, out loud, or on paper, then tap the card to flip.

What happens to the kinetic energy and potential energy of a substance as the temperature increases?

  1. Kinetic energy - increases as the particles will be moving quicker
  2. Potential energy - no change


Potential energy varies during a change in state but not during a temperature change.

Answer in your head, out loud, or on paper, then tap the card to flip.