As we begin our study of solids, liquids and gases in Middle School Chemistry, we quickly learn that everything that exists is made up of atoms and molecules (and ions).
Then, we start to explore matter through two basic principles:
- Atoms and molecules are attracted to each other
- These atoms and molecules are in constant motion.
We further see that the motion that particles of a substance have are actually a measure of their temperature. The more movement of atoms and molecules a substance has, the higher its temperature. Less movement of atoms and molecules means a lower temperature.
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