1. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved 1.1 Chemistry: An Introduction 1.2 What is Chemistry? 1.3 Solving Problems Using a Scientific Approach 1.4 The Scientific Method 1.5 Learning Chemistry

2. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Why Is Chemistry Important? New materials New pharmaceuticals New energy sources Food supplies Help the environment Can you think of others? 1

3. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved In this course, you will: Learn the principles of chemistry. Become a better problem solver! 1

4. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved The science that deals with the materials of the universe and the changes these materials undergo. The central science. Understanding most other fields of science requires an understanding of chemistry. 1 What is Chemistry? Bart Eklund checking air quality at a hazardous waste site.

5. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved 1.Recognize the problem and state it clearly. a)Making an observation. 2.Propose possible solutions to the problem or possible explanations for the observation. a)Formulating a hypothesis. 3.Decide which of the solutions is the best or decide whether the explanation proposed is reasonable. a)Performing an experiment. Scientific thinking can help you in all parts of your life! 1 Solving Problems Using a Scientific Approach

6. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Science Science is a framework for gaining and organizing knowledge. Science is a plan of action — a procedure for processing and understanding certain types of information. Scientists are always challenging our current beliefs about science, asking questions, and experimenting to gain new knowledge.  Scientific method is needed. 1

7. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Steps in the Scientific Method 1 Examples: 1.Pons and Fleishman, Univ. of Utah. 2.Horoscope 3.Weather. A mystifying problem from the textbook. Why did David and Susan get sick? Lead Poisoning in Italian pottery.

8. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Concept Check Which of the steps in the scientific method is missing from the following situation? “Your instructor is holding a balloon and quickly inhales some of the gas inside the balloon. He then speaks and his voice changes to a high-pitched sound (and sounds quite funny!). He then asks you to determine what gas was inside the balloon that he inhaled. Based on your observations, you conclude that the gas must be helium.” a)State the problem. b)Make observations. c)Formulate a hypothesis. d)Perform experiments. 1

9. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Scientific Terms Summarizes what happens. Law Theory (Model) An attempt to explain why it happens. Set of tested hypotheses that gives an overall explanation of some natural phenomenon. Hypothesis A possible explanation for an observation. 1 Law of Gravity. What makes a rocket fly?

10. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Aristotle Earth Air Fire Water

11. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Galileo Galilei Father of the Scientific Method Heavy things fall faster than light things???? Aristotle Free Fall Movie

12. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Archimedes Archimedes lived in Syracuse on the island of Sicily.

13. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Democritus (460-370 BC) Greek Philosopher who first coined the word “atomos”.

14. Chapter 1 Table of Contents Return to TOC Copyright © Cengage Learning. All rights reserved Learn the vocabulary. Memorize important information. Learn and practice processes. Keep working and learning from your mistakes. Ask questions! 1