Classification of matter Chapter 15 Classification of matter

What is matter? Anything that has mass and volume Matter will be either a PURE substance or a MIXTURE of substances

Examples of pure substances: Elements and Compounds elements are found on the periodic table EX: carbon, hydrogen, helium Compounds are made of elements combined together EX: water, salt

Mixtures are made of 2 or more substances that can be physically separated 2 types of mixtures: Heterogeneous mixture is when all parts can be distinguished easily EX: salad, granite, soup

2nd type of mixture Homogeneous mixture is when the particles are evenly mixed EX: coke, pudding, jello, milk

Special types of mixtures Colloids- word means glue Homogeneous mixture Normally Parts of the mixture will not settle out Example: milk When light goes through a colloid light is scattered and visible

When light is scattered by colloids it is called a Tyndall effect

Special mixture…. suspension Suspensions is a heterogeneous mixture and the particles settle to the bottom EX: dressing, muddy water

Solutions are another name for homogeneous mixtures Solutions have 2 parts Solvent- does the dissolving Solute- what is dissolved

Properties of Matter A property is a characteristic Physical properties are those characteristics you can see or measure and sometimes observe behavior EX: color, size, mass, texture, magnetic, boiling, freezing, phase change

Physical Properties Describe the material Physical changes are changes in size shape or matter You can change the size of the material but it is still the same material

Chemical Properties Characteristics of substances that indicate it will change its composition Ex: flammability When a substance changes form to another it is called a chemical change

The Law of Conservation of Mass The mass of a substance before a chemical change will equal the mass of ALL substances that remain. EX: burn wood…. Flames, ashes, gases releases