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Solids have a fixed volume and shape.
Liquids have a fixed shape but no definite volume.
Gases have no fixed volume or shape.
Substances always exist in the same state.
The state symbol for a liquid is (l).
Solids have more energy in their particles compared to liquids.
Particles in a gas move more slowly than in a liquid.
To change solids into liquids, thermal energy must be put in.
Freezing is the process of changing a liquid to a solid.
Melting and freezing happen at the same temperature.
Increasing the temperature of a gas will decrease its volume.
Increasing the pressure on a gas will decrease its volume.
During evaporation, particles with the least energy escape from the liquid surface.
In the heating curve of water, the temperature increases steadily until it reaches the boiling point.
The cooling curve of water shows a decrease in temperature as water is cooled.
The forces of attraction between particles in a gas are stronger than those in a liquid.