PPT-Chemical change or

Chemical change or Physical change Elephant Toothpaste Physical or Chemical The yeast acts as a catalyst to make the hydrogen peroxide break down really quickly Hydrogen peroxide breaks down into. Chapter 5.1 . BLM 5.1a, 5.1b. Chemicals and chemical Change. CHEMISTRY. – is the study of matter, its changes and its properties. MATTER. – is anything that has mass and takes up space. ATOM. – the smallest particle of matter. #1: What happens to a substance when a chemical change occurs?. #2: What are some signs of a chemical change?. Bell Ringer: Tuesday 10/1/13. Read the paragraph below and determine the main idea. Then, write and answer the questions. http://www.youtube.com/watch?v=F54rqDh2mWA. Chemical Change v. Physical Change. Chemical Change . Break or form chemical bonds. Molecular formulas of the products are NOT exactly the same as the reactants. Mrs. Lowe . April 2011. Chemical changes . Chemical change . is a change that forms a new type of matter . Chemical property . is a feature of matter that can cause a chemical change. Examples of a different type of matter forming during a chemical change. 1.7. Physical Changes. Physical Change. : the substance involved remains the same, even though it may change state or form. . Examples: . Dissolving – stirring a spoonful of sugar in water. Melting –an ice cube melts. A half eaten apple turns brown.. Physical or Chemical Change?. Chemical Change. Ripping paper into little pieces. Physical or Chemical Change?. Physical Change. Melting a popsicle. Physical or Chemical Change?. 10/20/14. What are Physical Properties?. Physical properties can be . observed. and measured without changing the . identity. of the substance. . Phase. Changes: . Melting. Point: the temperature at which a substance . . October 14, 2014. . Ms. Smith. Mrs. . Malone. DO NOW. :. Date. : . October 14, 2014. TEKS: . 6.8B calculate density to identify an unknown substance. Get out your . gold Do Now sheet. Put your . CB and agenda on your desk. or . Physical change. ?????. Elephant Toothpaste. Physical or Chemical? . The yeast acts as a . catalyst. to . make the hydrogen peroxide break down . really quickly. . Hydrogen . peroxide breaks down into . 1-12-16. Bell Work 1-12-16. When air is heated, it expands and rises. Hot-air balloon pilots use this phenomena to their advantage. These pilots use a gas-flame blower to increase the temperature of the air inside the balloon making the balloon rise. . EVIDENCE of a CHEMICAL REACTION . (aka a . CHEMICAL CHANGE. ). . . . . . T. he decomposition of hydrogen peroxide H. 2. O. 2. . !!. 2 H. 2. O. 2. . . 2 H. 2. O + . O. 2. http. ://. www.youtube.com/watch?v=4N0m95PExHY. Chapter 5.1 . BLM 5.1a, 5.1b. Chemicals and . Chemical . Change. CHEMISTRY. – is the study of matter, its changes and its . properties.. MATTER. – is anything that has mass and takes up . space. . Chemical Property. describes the ability of a substance to undergo changes in identity. Chemical Change. changes the identity of a substance. products have different properties. Signs of a Chemical Change. Changes. The Difference. Physical Change . – . matter changes form . but is still made of the same molecules, typically . reversible. Chemical Change . – a . change in the molecules . occurs, . cannot be reversed.