Particles

Gap-fill exercise

Select the correct word from the drop-down list to fill in all the gaps, then press "Check" to check your answers. You may need to use some words more than once.

cannot be because the particles are close together.
take the shape of the because the particles move around but stay close together
spread to fill the space available because the move around freely, at high speed.
condense when because the particles lose energy and move closer together.
evaporate because the particles gain energy and move further apart.
melt when heated because the particles gain energy and move around more.
cannot be poured because the particles cannot move around, only .
have low density because the particles are far .
can be because the particles move around but stay close together.