Answer:Spaces between particles are important because they help explain how matter behaves. In solids, the particles are packed closely together, so they keep their shape. In liquids, there is a bit more space, allowing the particles to move and flow. In gases, the particles are very far apart, which is why gases can spread out and fill any space. These spaces also allow matter to be compressed or expanded, like air in a balloon. They also help particles move and mix, like when we smell perfume from across a room. Lastly, the space between particles affects how heat moves through matter. More space means the particles can move faster when heated.