PPT-Signs of Chemical Change

October 14 2014 Ms Smith Mrs Malone DO NOW Date October 14 2014 TEKS 68B calculate density to identify an unknown substance Get out your gold Do Now sheet Put your CB and agenda on your desk. 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. . ACTIVITIES. 1.. . Blue Bottle. 2. Foam Column. Solid Reaction. Flame Tests. Burning Magnesium. Carbon Pillar. Skills Focus:. Making Observations. Qualitative vs. Quantitative. Aim: To find out the different signs of a chemical . #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. Veterinary Assisting. Mrs. Cook. Safety. People who work with animals are faced with potentially hazardous situations on a daily basis. . Safety. OSHA:. Government agency that “assures safe and healthful working conditions for working men and women”.. 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. the . difference . between . physical changes . and . chemical . reactions.. *Tell evidence of . physical changes . and . chemical reactions. . *. Categorize . changes as . physical. or . chemical. , and . Demo . At the start:. Luminol. solution: . blue . liquid. Hydrogen peroxide: clear liquid. What we saw:. Glowing blue color and then an ugly brown color. Bubbles. Temperature rose about 7-8 ºC. Signs of a chemical reaction: Energy change (light, heat), gas formation, color change. Color change. Increase or decrease in temperature. Gas production (not boiling). Precipitation: 2 liquids react to make a solid. Change in properties (density, smell, taste, texture, melting points, boiling points, hardness, etc.). and. Physical Properties. . Observations that . DO NOT CHANGE . the substance or mixture. Measure. See. Smell. Hear. Touch. Taste. Chemical Properties. Describes how the substance or mixture will react with another.