Intro to Matter, Physical and Chemical Changes

Common Core Connection Objectives Today I will be able to: Identify matter as an element, compound or mixture Differentiate between chemical and physical properties and changes Informal Assessment – monitoring student interactions as they complete the practice Formal assessment – analyzing student responses to the warm up, exit ticket and practice Common Core Connection Reason abstractly and quantitatively Use appropriate tools strategically

Lesson Sequence Evaluate: Warm – Up Elaborate: Element, Compound, Mixture Practice Explain: Chemical and Physical Changes Notes Elaborate: Chemical and Physical Changes Practice Evaluate: Exit Ticket

Warm - Up 28.50 g of iron shot is added to a graduated cylinder containing 45.5 ml of water. The water level rises to the 49.1 ml mark. From this information, calculate the density of the iron. Identify the following as an element, compound or mixture Gold Lemonade Salt

Objective Today I will be able to: Identify matter as an element, compound or mixture Differentiate between chemical and physical properties and changes

Homework Finish Chemical and Physical Changes Practice Wear Closed Toe Shoes Wednesday and Friday!  Chemical and Physical Changes lab

Agenda Warm – Up Element, Compound, Mixture Practice Chemical and Physical Changes Practice Exit Ticket

Element, Compound, Mixture Practice

Chemical and Physical Changes and Properties

Physical Properties An aspect of matter that can be observed or measured with out changing it Intensive Properties – do not depend on the amount of matter present (density, boiling point, freezing point, color, odor) Extensive Properties – depend on the amount of matter that is present (mass, volume, pressure, length)

Chemical Properties Enables a substance to change into a brand new substance, and they describe how a substance reacts with other substances Flammability Reactivity

Changes in Matter Through experimentation and natural occurrences, matter tends to change in either of two ways - Physical Changes - Chemical Changes

Physical Changes Only physical properties change The form of matter changes, but the identity of the matter remains the same Examples: change in state (phase change), breaking a pencil, tearing paper

Physical Changes Phase Change – physical process in which one state of matter is transformed into another

Physical Changes

Chemical Changes Properties of original substance disappear as new substances with different properties are formed Change in chemical composition Cannot return to original form Can be detected through – energy changes (temperature), change in color, emission of gas, solid formed Examples – wood burning, iron rusting, sour milk

Examples – Chemical or Physical Change? A match lights when struck Wood is placed into a chipper A lump of gold is pounded into a large, thin sheet Baking powder bubbles and gives off CO2 when it is moistened A pan of water boils on the stove Hydrogen Sulfide gas causes silver to tarnish

Chemical and Physical Changes Practice Complete the practice at your desk. Whatever you do not finish will become your homework

Exit Ticket Watch the following clip Decide if this is a chemical change or a physical change. Explain why Video Clip