Complex sentence: Condensed matter physics is the field of physics dealing with the physical properties of condensed phases of matter, which appear when a number of atoms, typically larger than the molecular scale, interact strongly and adhere to each other or are otherwise highly concentrated in a system.
Split into simpler sentences: Condensed matter physics is the field of physics dealing with the physical properties of condensed phases of matter. These properties appear when a number of atoms, typically larger than the molecular scale, interact strongly and adhere to each other or are otherwise highly concentrated in a system.