# Chapter Three

### Matter, Properties, and Changes

## Properties of Matter!

## Heterogeneous & Homogeneous

## Separating Mixtures.

## Elements and Compounds

## Law Of Definite Proportions & Law Of Multiple Proportions !

Law of multiple proportions state that when different compounds are formed by a combination of the same elements, different masses of one element combine with the same relative mass of the other element in a ratio of small whole numbers

## Line GraphIn chemistry, most graphs that you create and interpret will be line graphs. The points on a line graph represent the intersection of data for two variables. The independent variable is plotted on the x-axis. The dependent variable is plotted on the y-axis. Remember that the independent variable is the variable that a scientist deliberately changes during an experiment. | ## Bar GraphA bar graph often is used to show how a quantity varies with factors such as time, location, or temperature. In those cases, the quantity being measured appears on the vertical axis (x-axis) . The independent variable appears on the horizontal axis (y-axis). A bar graph can be used to compare population figures for a country by decade. | ## Circle GraphThe circle graph is sometimes called a pie chart. This graph is useful for showing parts of a whole. The parts are usually labeled as percents with the circle as a whole representing 100%. |

## Line Graph

In chemistry, most graphs that you create and interpret will be line graphs. The points on a line graph represent the intersection of data for two variables. The independent variable is plotted on the x-axis. The dependent variable is plotted on the y-axis. Remember that the independent variable is the variable that a scientist deliberately changes during an experiment.

## Bar Graph

A bar graph often is used to show how a quantity varies with factors such as time, location, or temperature. In those cases, the quantity being measured appears on the vertical axis (x-axis) . The independent variable appears on the horizontal axis (y-axis). A bar graph can be used to compare population figures for a country by decade.