1. Matter -Properties and Changes Chapter 3.1 – 3.3 By: Mercedes Wallis, Leah Laroche, and Hannah Sielk

2. What is a substance? A substance (also known as a pure substance) is a matter that cannot be changed physically or chemically. It will always stay the same no matter what. and Examples: Table Salt Pure water

3. States of Matter Matter is find all around us in our everyday life. All matter has been categorized into 3 groups: Solid, Liquid, and Gas.

4. Solid Solids are hard because the particles inside are tightly packed together. There is very little space between the particles. Examples:

5. Liquid Liquids can occupy an space they are put into. This is because the particles are not tightly packed and can move freely. They are able flow easily around each other. Examples:

6. Gas Fills up any space, taking both the shape and volume of the container. This is because the particles are loosely packed. They have a lot of free space to move around anywhere. Example: Air

7. Physical Property This is the characteristics of an object. It helps us identify whatever the object may be. You can recognize objects by any of your 5 senses. Physical Properties -Color -Shape -Smell

8. Extensive property Physical property is put into 2 categories. One of them is Extensive property. This relies on the amount and size of the substance being measured. Examples: -Mass -Length -Volume

9. Intensive property Example is density. It is independent of the amount of substance present. Density of a substance (at constant temp. and pressure) is the same no atter how much substance is present. It is often indentified by thiis. Only of these can help identify it. Like spices smell. Intensive property are properties that do not change with the amount of a substance.