2A.3 & 2B.2 Notes Measuring Matter 9/10/18

Density The mass of a substance per unit of volume Density = Mass ➗ Volume Density is measured in grams per milliliter (g/mL) or grams per centimeter cubed (g/cm3) Mass is measured in grams (g) Volume is measured in milliliter (mL) or centimeter cubed (cm3)

Determining Mass Mass is measured on a scale Mass and weight are two different things Weight is a measure of gravity Mass is a measure of the amount of matter in an object Your mass does not change

Determining Volume The amount of space a solid, liquid, or gas takes up. Volume = Length x Width x Height Water Displacement Measuring: Using a graduated cylinder filled with a specific amount water. You place the object inside and measure the difference in volume.

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Matter How much space an object takes up. Solid Liquid Gas

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Mixtures Two or more different substances that retain their own individual properties and are combined physically (mixed together) Mixtures can be separated by physical means Filtration, sifting, evaporation

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Heterogeneous Mixtures The mixture is not uniform throughout The mixture is unevenly distributed The substances are visibly distinguishable

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Homogenous Mixture The mixture is uniform throughout The substances are evenly mixed and can not be distinguished The substances are so small they can not be seen easily Also called a solution

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Pure Substances A substance that can not be separated by physical means. Each pure substance has its own set of unique set chemical and physical properties which helps identifies it. 

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Element Can not be changed into simpler substances Composed of one kind of atom These are found on the period table Ex.) Hydrogen, Oxygen, Carbon

Heterogeneous Mixtures Classifying Matter Matter Mixtures Pure Substances Heterogeneous Mixtures Homogeneous Mixtures Elements Compounds

Compounds Pure substances that are composed of two or more atoms that are chemically combined Compounds can only be changed into simpler substances by chemical changes. Ex.) Carbon Dioxide, Water, DNA