Matter is anything that takes up space and has mass, including invisible substances. It is made of elements, the basic building blocks of atoms, and compounds, which are combinations of two or more elements chemically bonded together. Matter can also exist as mixtures of elements and compounds mixed together without chemical bonds. Physical changes alter the state of matter between solid, liquid and gas, while chemical changes create new substances through chemical reactions.

1. What is Matter ? Matter is anything that has mass and takes up space. It’s the “stuff” that makes up the universe. It can even be invisible, right?

2. Properties of Matter Each specific substance has its own properties. Examples: Hardness Texture Shape Temperature Flammability Color

3. Elements A substance that cannot be broken down into any other substances by chemical or physical means. Building blocks of matter. Made up of tiny particles called atoms. Represented by a one or two letter symbol.

4. Compounds A substance made of two or more elements chemically combined in a specific ratio. Shown by a formula. H 2 O, NaCl

5. Mixtures Mixtures are made of two or more substances - elements, compounds, or both - that are together but not chemically combined. Substances keep their own properties. Not necessarily present in specific ratios.

6. Physical Changes A change in state between solid, liquid, or gas. Alters the appearance but not the substance itself.

7. Chemical Changes A change in matter that produces a new substance. Also called a chemical reaction. Made of same substances as original but rearranged in new combinations.