Summary questions 1. Copy and complete the sentences.
There are three states of matter: ____________, ____________ and ____________. The particles in a solid are packed ____________ together. The particles are in a fixed position, but they do ____________. The particles in a liquid can ____________ past each other. This allows liquids to ____________. The particles in a gas are ____________ far apart. As a result, gases can be ____________. ____________ is the spreading out of particles to fill the space they are in.
2. Copy the table below and use the particle theory to draw the arrangement of particles in solids, liquids and gases.
Solid Liquid Gas
3. Use the particle theory to explain why it is possible to pour a liquid but not a solid. 4. Use a diagram to explain how a substance can change state from a solid to a gas. 5. Outline an investigation you would use to show that air has mass and takes up space. 6. What does the term ‘diffusion’ mean? 7. Fig. 14.14 shows the changes of state for water. Name the changes labelled A, B and C.