A substance gets heated up. The density decreases, the mass remains the same. - The particle movement increases. The distance between them grows. The number of particles remains the same., A liquid freezes and turns solid. - Particles form a regular pattern with fixed positions., A liquid evaporates. - Particles move away from each other and fill the room., Liquid A evaporates faster than liquid B. - The force of attraction between the particles is weaker for A than for B., A gas condenses. The volume decreases significantly. - The distance between the particles decreases significantly. The force of attraction between the particles increases significantly., Solids and liquids can’t really be compressed. - The particles are densely packed., Liquids and gases take on the shape of their container. - The particles can move past another. They are not fixed in one position., A solid gets heated up and melts. - The particles move faster and leave their fixed positions., Solid A has a higher melting point than solid B. - The force of attraction between the particles is stronger for A than for B., A solid gets dissolved in water. - The particles leave their fixed positions and distribute between the water molecules., A substance has a distinctive smell. - Particles of the substances reach the nose and activate the receptor cells.,

particle model - substance level vs. particle level

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