Classification of Matter Pure substance Mixtures Compounds Elements Homogeneous Heterogeneous Organic Inorganic

Classification of Matter Matter is anything with mass and volume Two general categories all matter can be divided into are Pure substance: matter in which all the basic units are the same Mixtures: substances that are put together but not chemically combined

Pure substances can be further subcategorized as Compounds: Two or more elements that are chemically combined Elements: Substance made up of only one type of atom

There are two types of compounds based on the source of the compound in nature, living or non-living substances All living substances have carbon

Inorganic compounds: either contain no carbon or single carbon atoms Organic compounds: most contain chains of carbon All sources of energy in your diet contain organic compounds What nutrients provide you with energy? Inorganic compounds: either contain no carbon or single carbon atoms Minerals and water are examples

Mixtures are classified as Homogeneous: having a uniform distribution of particles throughout the sample Solution: Homogenus mixture of one material dissolved into another Solute- the material that is dissolved Solvent- the material that does the dissolving Heterogeneous: a non-uniform distribution of particles

Group Activity Using the Matter Classification concept map List three examples of Compounds, Elements, Heterogeneous Solutions, Homogenous Solutions

Physical Changes Physical Changes involve changing the shape, physical state, size, or temperature without changing the chemical identity Phase change is a visible change in structure without changing the molecular structure

Chemical Changes Occurs whenever new substances with different chemical and physical properties are formed Evidence: Color Odor Flavor Release of gas Transfer of energy (change in temperature)