<p> Changing Matter Study Guide</p><p>We will have a test on Friday, February 24th. The information from this test is closely related to our last test. Therefore some information on this study guide will seem familiar. </p><p>Matter: Anything that has mass and takes up space.</p><p>Volume: How much space an object takes up. Liquids are measured using a graduated cylinder/beaker in milliliters or cubic centimeters. Irregular solids may be measured by placing in water and calculating the movement of the water.</p><p>State of Matter Liquid: Loosely packed particles, takes shape of container, definite volume Solid: Tightly packed particles, definite shape, definite volume Gas: Scattered particles, no definite shape, no definite volume</p><p>Freezing: liquid to solid Melting: solid to liquid Evaporation: liquid to gas Condensation: gas to liquid</p><p>Change in temperature causes a change in state. Freezing Point of water Melting point of water Boiling point of water Evaporation: Slow change of a liquid to a gas without boiling Rust: Chemical change where iron changes from smooth gray metal to brittle brown substance. Tarnish: Chemical change where silver reacts with sulfur. Chemical change: Begins with one kind of matter and ends with another. Signs of a change are heat, light, and bubbles. Tarnish and rust are examples. Physical change: Begins and ends with the same type of matter. It is a change in shape, size, texture, or state. Real world examples: mixing food, ripping paper Mixture: combination of two or more kinds of matter (trail mix, peas and carrots). Solution: mixture where two or more substances blend completely (Kool-Aid, salt water). How would you separate salt and water? How would you separate sand and water? </p>