CHEMISTRY AND SCIENCE.

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CHEMISTRY AND SCIENCE

You must learn to think on the atomic level. A main challenge of chemistry is to understand the connection between the macroscopic world that we experience and the microscopic world of atoms and molecules. You must learn to think on the atomic level. Copyright © Cengage Learning. All rights reserved

Atoms vs. Molecules Matter is composed of tiny particles called atoms. Atom: smallest part of an element that is still that element. Molecule: Two or more atoms joined and acting as a unit. Copyright © Cengage Learning. All rights reserved

Oxygen and Hydrogen Molecules Use subscripts when more than one atom is in the molecule. Copyright © Cengage Learning. All rights reserved

A Chemical Reaction One substance changes to another by reorganizing the way the atoms are attached to each other. 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. Copyright © Cengage Learning. All rights reserved

Fundamental Steps of the Scientific Method Process that lies at the center of scientific inquiry. Copyright © Cengage Learning. All rights reserved

Scientific Models Summarizes what happens. Law Hypothesis A possible explanation for an observation. Theory (Model) An attempt to explain why it happens. Set of tested hypotheses that gives an overall explanation of some natural phenomenon. Copyright © Cengage Learning. All rights reserved

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