C. is made up of three principal different states gas liquid solid
D. has properties of hardness texture shape temperature and much more
2. What is matter made of? Elements Pure substances that can’t be broken down oxygen = O 2 table salt, sugar Compounds Pure substance made of 2 or more elements Carbon + 2 Oxygen = Carbon Dioxide CO 2 Hydrogen + Oxygen = H 2 O A. PURE SUBSTANCES: 1 kind of matter
What is matter made of? B. NOT A PURE SUBSTANCE Mixtures - 2 or more substances mixed together not chemically combined Substances keep their properties Solutions are the “best-mixed” mixture
Changes in Matter Physical change: alters the form, but not its identity Chemical change: a substance that changes or combines to form a new substance Chemical activity: the ability of a substance to change
Testing your knowledge…. In the photos, can you tell which is an element, compound, or mixture. Review: An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances that are only physically joined together, not chemically. A mixture can contain both elements and compounds.