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Transcript
CHEMISTRY…IT’S ALL AROUND US What is Chemistry? Objectives: • The learner will understand the role of chemistry in their lives. • TLW investigate the characteristics of matter. • TLW explore the interactions of matter & energy. Key Topics • • • • States of Matter Changes of Matter Evidence of a Chemical Change Chemical Reaction/Chemical Equation What is Chemistry? • Chemistry is the study of chemicals their properties, and the reactions in which they are involved. What is a Chemical? • Chemical- any substance that has a definite composition (everything). What is a Chemical Reaction? • Chemical reaction- the process by which one or more substances change to different substances. What are the 3 States of Matter? • Solid • Liquid • Gas States of Matter Solid Fixed volume Fixed shape Liquid Fixed volume No fixed shape Gas No fixed volume No fixed shape What are Changes of Matter? Two Categories: Physical Chemical What are Physical Changes? • Changes in which the substance stays the same. • Changes of states What are Chemical Changes? • Substance changes to different substance. What type of change is it……..? • • • • • • Cutting paper Wood burning Rust Ice cream melting Water boiling Milk souring Answers: • • • • • • Cutting paper-physical Wood burning-chemical Rust-chemical Ice cream melting-physical Water boiling-physical Milk souring-chemical What are some evidences of Chemical Changes? • Evidence that a chemical change may be happening usually involves: 1) evolution of a gas. 2) formation of a precipitate. 3) an energy change. 4) a color change. Evidence of a Chemical Change Gas Evolution Bubbles form or odor Change in Energy Formation of a Precipitate Change in temp. or light given off Cloudy appearance; precipitate forms Color change Color looks different Chemistry……It’s All Around Us!!!!!!! • Please keep your Scientific Notebook in order. • Review All Work Daily
