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7.2 The Particle Theory of Matter
Pearson Education
www.sciencesource.ca
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Across
2. The particles of matter are in constant _____.
4. Liquids take the _____ of their containers.
5. Everything that you can see as well as everything that you cannot see is made up of _____, which are very small portions of matter.
7. _____ is the energy that transfers from a substance at a higher temperature to a substance at a lower temperature.
8. All particles of one substance are _____.
11. _____ is released when a substance changes its state from gas to liquid, liquid to solid or directly from gas to solid.
13. The change of state from gas to solid is called _____.
15. There are _____ between particles.
16. Changing the temperature of matter can cause it to change to a different _____.
19. _____ contain varying amounts of their component particles.
20. There are six key points of the particle _____ of matter.
21. The change of state from gas to liquid is called condensation or _____.
22. There are forces of _____ between particles.
Down
1. The change of state from solid to gas is called _____.
2. All _____ is made up of particles.
3. The change of state from a solid to a liquid is called _____.
6. The change of state from liquid to solid is called freezing or _____.
9. _____ affects the speed at which particles move.
10. Particles have forces of _____ between them.
12. In _____, the particles move around as far as the space they are in allows, completely filling the space in the container.
14. When heat transfers from a hotter substance to a cooler substance the particles in the cooler substance start to move _____.
17. The change of state from liquid to gas is called evaporation or _____.
18. Particles move because they have _____ energy.
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