Zumdahl • Zumdahl • DeCoste World of CHEMISTRY
Chemistry: An Introduction Chapter 1 Chemistry: An Introduction
The Importance of Learning Chemistry Objective: To Understand the importance of learning chemistry Copyright © Houghton Mifflin Company
1.1 The Importance of Learning Chemistry Chemistry occurs all around us: Examples
Real World Chemistry Chloroflurocarbons (CFC’s) Uses Non-corrosive Resists decomposition Uses Air Conditioning/ Refrigeration Insulation SOUND LIKE THE PERFECT PRODUCT? Copyright © Houghton Mifflin Company
Benefits of Learning Chemistry Learn how to problem solve Applicable in business Health Environment Copyright © Houghton Mifflin Company
Objective: To define chemistry 1.2 What is Chemistry? Objective: To define chemistry Copyright © Houghton Mifflin Company
1.2 What is Chemistry? Chemistry is the science that deals with the materials of the universe and the changes that these materials undergo. Copyright © Houghton Mifflin Company
Chemical Changes Occur Around Us Wood burns → H2O +CO2 Steel oxidizes → RUST Eggs, Sugar, Flour + BAKING POWDER →CAKE Combustion of low quality Coal → Acid Rain Show Video and ask students to note changes , colors, steam emission, What are possible explanations? Copyright © Houghton Mifflin Company
Macroscopic vs. Microscopic Example: Tree → →→ H2O , CO2 and C6H12O6 Copyright © Houghton Mifflin Company
1.3 Solving Problems Using a Scientific Approach Objective: Recognize the general steps scientist use in solving problems Copyright © Houghton Mifflin Company
Problem Solving Recognize the problem and state it clearly (making and observation). Propose possible solution/possible explanation (forming a hypothesis). Decide which solution is best/is the explanation plausible (perform and experiment). Copyright © Houghton Mifflin Company
Problem Solving Observe Hypothesis Experiment Copyright © Houghton Mifflin Company
1.4 Using Scientific Thinking to Solve a Problem Objective: To Illustrate the scientific method. Copyright © Houghton Mifflin Company
The Case of the Mysterious Illness Symptoms: Nausea, muscle pains, irritability, weight Loss, excruciating pain, uncharacteristic fits of anger. Can You Solve The Mystery? What other information do you need? Copyright © Houghton Mifflin Company
Objective: To describe the method scientist use to study nature. 1.5 The Scientific Method Objective: To describe the method scientist use to study nature. Copyright © Houghton Mifflin Company
Steps in the Scientific Method Observe Hypothesis Experiment Copyright © Houghton Mifflin Company
Completing the Scientific Method Conduct the problem solving sequence A set of tested hypothesis that supports our observations → THEORY (model) LAWS describe a broad variety of observations and experiences – they are the basic rules under which nature operates. Observation = something we can witness and can be recorded Theory is an interpretation, i.e. Why something happens. Copyright © Houghton Mifflin Company
Clarifying Terms Observation = something we can witness and can be recorded. Theory = an interpretation, i.e. Why something happens. Theories change as more information becomes available Law = summary of observed behavior, i.e. What Happens. Copyright © Houghton Mifflin Company
Figure 1.1: The various parts of the scientific method. Copyright © Houghton Mifflin Company
Objective: To develop successful strategies for learning chemistry. Copyright © Houghton Mifflin Company
Figure 1.2: Student-centered learning. Copyright © Houghton Mifflin Company
Tips For Success Memorizing is not understanding. You memorize facts You understand the core principles using the facts. Practice, Practice, Practice! On Line Support http://www.classzone.com/cz/books/woc_07/book_home.htm Copyright © Houghton Mifflin Company