Chapter 1 Introduction to Chemistry
Big Idea: Chemistry is a science that is central to our lives.
Section 1.1 A Story of Two Substances - 1
Main Idea: Chemistry is the study of everything around us. . Chemistry is the study of matter. . Chemicals are also known as substances.
Section 1.1 A Story of Two Substances - 2
. Ozone is a substance that forms a protective layer in Earth's atmosphere. . CFCs are synthetic substances made of chlorine, fluorine, and carbon that are thinning the ozone layer.
Section 1.2 Chemistry and Matter - 1
Main Idea: Branches of chemistry involve the study of different kinds of matter. . Models are tools that scientists, including chemists, use.
Section 1.2 Chemistry and Matter - 2
. Macroscopic observations of matter reflect the actions of atoms on a submicroscopic scale. . There are several branches of chemistry, including organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, and biochemistry.
Section 1.3 Scientific Methods - 1
Main Idea: Scientists use scientific methods to systematically pose and test solutions to questions and assess the results of the tests. . Scientific methods are systematic approaches to problem solving. . Qualitative data describe an observation; quantitative data use numbers.
Section 1.3 Scientific Methods - 2
. Independent variables are changed in an experiment. Dependent variables change in response to the independent variable. . A theory is a hypothesis that is supported by many experiments. . Observations, existing knowledge, qualitative data, quantitative data
Section 1.3 Scientific Methods - 3
. Hypothesis, testable statement or prediction. Experiments, conclusions, revised hypothesis. Theory, experiments, revised theory.. Theory, hypothesis supported by many experiments. Scientific Law, summary of accepted facts of nature
Section 1.4 Scientific Research - 1
Main Idea: Some scientific investigations result in the development of technology that can improve our lives and the world around us. . Scientific methods can be used in pure research or in applied research.
Section 1.4 Scientific Research - 2
. Some scientific discoveries are accidental, and some are the result of diligent research in response to a need.. Laboratory safety is the responsibility of everyone in the laboratory. Many of the conveniences we enjoy today are technological applications of chemistry.