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Welcome back to Honors Chemistry! Please sit in your assigned seat with your name-plate in front of you. Absent yesterday? Here are some highlights: Make a Name-Plate to place in front of you. Write your first name and last name on BOTH sides. YOU’RE A CHEMISTRY STAR! Inspiration Wall Activity Your first and last name inside your star You may choose to include: Thought that is important to you A picture Song Lyrics Famous Quote Family Favorites SCHOOL APPROPRIATE PLEASE! What a great inspiration to see everybody displayed CLASSROOM GUIDELINES TO SUCCESS Let’s share some important information: Classroom expectations Guidelines Grading policy TODAY’S LESSON: WHAT IS CHEMISTRY? Chemistry is the study of composition of substances and the changes it undergoes. Chemistry is the study of matter. THE POWER OF OBSERVATION One of the most important skills of a chemist! It allows us to detect chemical and physical changes. The heart of chemistry. CHEMICAL AND PHYSICAL CHANGES Physical Change Alters a given material without changing its composition. Cutting, grinding, bending, boiling, freezing, crushing. Chemical Change A change that produces a new substance or substances. Rusting, tarnishing, milk souring, baking cookies, a gas is released, heat is released or absorbed. WHAT IS THE DIFFERENCE BETWEEN AN OBSERVATION AND A CONCLUSION? Observations are what you see, hear, feel, and what you smell from your environment. Using your senses, detect changes. Conclusions are based upon your observations. They try to explain why you observed the phenomena you did. Learning to think like a scientist… Let’s grab a chemistry book. Page 15 Introduction Paragraph Partner Read Pages 15&17 Worksheet review Take 5-7 minutes to complete New Experiment: Observing and Questioning… SAFETY GLASSES MUST BE WORN AT ALL TIMES TODAY IN THE LAB.