RT Book, Section A1 Delio, Joseph A1 Berger, Jeffrey S. A2 Freeman, Brian S. A2 Berger, Jeffrey S. SR Print(0) ID 1102565851 T1 Properties of Gases and Liquids T2 Anesthesiology Core Review: Part One Basic Exam YR 2014 FD 2014 PB McGraw-Hill Education PP New York, NY SN 9780071821377 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1102565851 RD 2024/04/18 AB Matter in the universe, defined as anything that occupies space and has mass, exists in three phases—gases, liquids, and solids. All substances are made of atoms or molecules that are constantly in motion, although not necessarily seen by the naked eye. This assumption is essential to account for many of the properties of gases and liquids.