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Question Notes Tool Box: Summary: (Answer EQ- completed after notes) Topic/ Objective: Understand how matter is classified. Name Date Essential Question: Summarize the different types of classifications for matter. Period Tool Box: Summary: (Answer EQ- completed after notes) Question Notes

2.1 Classifying Matter Why are elements and compounds classified as pure substances? Symbols to represent elements Substance- every sample has fixed/ uniformed composition Element- has fixed composition because its made of only one type of atom 1-2 letters, 1st letter always cap. Some symbols use Latin names (ex Gold Au aurum) Common language for scientists!

Heterogeneous: “different” “kind” 2.1 Classifying Matter Heterogeneous: “different” “kind” Parts are noticeably different Homogeneous: substances evenly distributed cannot distinguish parts Heterogeneous: salad dressing Homogeneous: salt water Solute dissolves in a solvent- forms a homogeneous mixture particles intermediate in size (between sm. Particles in soln. and larger particles in suspension); do not separate into layers Two types of mixtures Ex of each: What is Solution? A Colloid is…

Filtration-size of particles Distillation-boil solution 2.1 Classifying Matter-2.2 Physical Properties Filtration-size of particles Distillation-boil solution Viscosity (flow), conductivity (electric), malleability (shape), hardness, melting/boiling points, density. Property of material changes not the composition How separate mixtures? Physical properties include: What is a physical change?

Chemical composition/ make up 2.2Physical Properties-2.3 Chemical properties Chemical composition/ make up Color change, produce gas, form precipitate (solid), What is a chemical property? Evidence of a chemical change: