BELLWORK 8/21/17 SOLIDS LIQUIDS GASES Volume & Shape Definite Volume & Shape Spacing between particles Amount of Energy High

Post – Lab Questions

Classification of Matter

Classification of Matter Pure Substance – Every sample of the substance has the same composition and characteristics. Example: Pure Water, Pure gold, vinegar

Pure Substances Pure substances can also be divided into 2 categories: compounds and elements.

Pure Substances Compound – Two or more elements chemically bonded together. Examples: Carbon Dioxide (CO2) Water (H2O) Salt (NaCl) Sucrose (C12H22O11)

Pure Substances Elements – Substances made up of only one type of atom. - Cannot be separated by any physical OR chemical process. Examples: Carbon Helium Gold

Mixtures Mixture – A blend of two or more kinds of matter, each of which keep their own identity and properties. Even though it may look different, it is still copper and zinc. Each metal retains its own properties like melting point. Example: Copper and Zinc can be mixed together to produce brass.

Heterogeneous Mixtures Some mixtures are impure . Heterogeneous mixture – Uneven distribution of substances. (Very impure) - You can see the different parts. Examples: Sand Granite Wood

Homogeneous Mixtures Homogeneous Mixture – Components are evenly mixed. (More pure than heterogeneous) Ex: sugar water, saltwater, air, quartz Seawater distillation plant

Checkpoint 1. 2. 3. 4. 5. 6.

ANSWERS 1. oil and water – heterogeneous 2. milk – homogeneous 3. tea – homogeneous 4. chicken noodle soup – hetero 5. orange juice (without pulp) – homo 6. sand - heterogeneous