Across
- 1. The particles of a solid are held next to each other in a ... position
- 3. The particles of a gas move about ... and are far apart making them less dense than other states of matter
- 4. There are ... forces of attraction between the particles. The forces stop the particles moving completely away from each other but are not strong enough to hold in fixed position (in a liquid)
- 5. The ... of a substance is defined as its mass per unit volume
- 9. The particles in a substance have ... due to their individual positions relative to each other
- 14. Gas particles are the most ... of the states of matter
- 15. The temperature at which a liquid turns to a ... is called the boiling point
- 16. The ... energy of a substance is the total energy in the kinetic energy store and the potential energy store of the particles in the substance
- 18. When a substance is ... the energy of its particles increases, so its internal energy increases
Down
- 1. Objects with a density that is less than the density of a given liquid will ... in that liquid
- 2. ... is the energy needed for a substance to change its state without changing its temperature
- 6. ... change the melting and boiling points of a substance
- 7. The three ... are gas, liquid and solid
- 8. The temperature at which a solid changes to a liquid is called the ...
- 10. The forces of attraction between the particles are too small to be ..., so the particles of a gas are completely separate from each other (in a gas)
- 11. The ... of the forces of attraction between the particles of a substance explains why it is a solid/liquid/gas
- 12. There are strong forces of attraction between the particles and each particle ... around a fixed position (In a solid)
- 13. The particles of a ... move about at random and are in contact with each other
- 17. When a substance changes state, its ... stays the same because the number of particles stays the same