Matter exists in different physical states LESSON 1.4 Matter exists in different physical states

What determines states of matter? Def: forms in which matter can exist Ex: solid, liquid, gas Molecules of a substance do not change, the arrangement of the molecules does change

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Solids Fixed volume and fixed shape Particles are close together Particles are attached and cannot move to another location Particles vibrate in one fixed place

Solids Particles in solids usually have less space between them than liquids Gas Liquid Solid

Solids H₂O is an exception with more space between molecules of ice than between molecules of water This causes ice to ‘float’

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Liquids Fixed volume but no fixed shape Takes on the shape of a container

Liquids Particles attract and are close together Particles are not fixed in one place and can move from place to place

Liquids Volume of liquid can be measured Molecules in a liquid are not tightly attached allowing them to flow

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Gases No fixed volume or shape Takes on shape and volume of container

Gases Particles not close together, can move in any direction Space between particles changes easily

Gases Adding gas to a rigid container does not change the volume, it just causes less space between particles

Gases Gas molecules bouncing off one another create pressure Temperature affects their movement and pressure

Circle your level of understanding of these concepts: 1 2 3 4