matter - anything that has mass and takes up space., particle theory of matter - states that all matter is made up of tiny particles that are constantly moving. The speed the particles move depends on which state of matter they are in., solids - particles are close together and are very strongly attracted to each other. They are locked in a pattern and vibrate in place with a fixed shape and volume. The spaces between the particles are small., gases - particles are far apart and can move in any direction because the attraction forces between them are weak. They have no fixed shape and no fixed volume. They expand to fill their container., liquids - particles are slightly farther apart. Particles are less attracted to each other and are able to slide past each other.,

Particle Theory of Matter - Grade 7 Ontario Curriculum 2022

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