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1. Properties of states of matter

   • motion and arrangement of particles
     • Describe the process of expansion and contraction.
       • https://youtu.be/aT4tkbM38Fg
     • Describe the role of pressure in expansion and contraction of materials
       • Thermal expansion gas Thermal expansion solid
       • http://www.schoolphysics.co.uk/animations/Heat%20energy%20animations/Bromine_diffusion/index.html
     • Account for the temperature changes in a substance as pressure is applied or removed.
     • Deduce dissolving is sped up if heat is applied to a solution.

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