During boiling, bubbles appear in the liquid water. in the boxes below represent the

arrangement of molecules inside the liquid water and inside a bubble.

Solids, liquids and gases are the three states of matter.

In solids, the molecules are very tightly packed and they cannot move.

In liquids, the molecules are present close together in a random fashion. They are free enough to move.

In gases, molecules are widely separated.  They can move easily.

The molecules in a liquid can be drawn as:

∅  ∅   ∅  ∅ ∅

∅ ∅  ∅ ∅ ∅∅

∅ ∅ ∅ ∅ ∅ ∅

The molecules in a gas can be drawn as:

∅                        ∅

     ∅

∅                    ∅