Today, the grade seven began their study on Substances.
We learned about the particle theory of matter.
Particle Theory states that:
1. All matter is made up of tiny particles.
2. All particles of one substance are the same.
3. Different substances are made of different particles.
4. Particles are always moving. (The more energy, the
faster they move)
5. There are attractive forces between particles. (Forces
are stronger when particles are closer together)
We watched the video below
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