There are three states of matter – solids, liquids and gases Changes of state There are three states of matter – solids, liquids and gases When a substance changes state, the particles gain or lose energy Melting – solid into liquid (gain) Freezing – liquid into solid (lose) Boiling – liquid into gas (gain) Condensing – gas into liquid (lose) Changes of state
Changes of state - warming
Changes of state - cooling
Element, Compound, Mixture An element is a substance which contains only one type of atom A compound is a substance in which two or more atoms are chemically joined together A mixture contains two or more elements or compounds that are not chemically joined together. Element, Compound, Mixture
Element, Compound, Mixture
Separation Techniques The substances in mixtures can be separated physically; compounds cannot be broken down physically Separation Techniques
Distillation Distillation
Chromatography Chromatography
Separating Sand and Salt
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