In everyday life, we commonly come in contact with water as a solid (ice), as a liquid, and as a gas (steam). Under the proper conditions of temperature and pressure, many substances—not only water—ca...In everyday life, we commonly come in contact with water as a solid (ice), as a liquid, and as a gas (steam). Under the proper conditions of temperature and pressure, many substances—not only water—can experience the three different phases. An understanding of the phases of matter is important for our understanding of all matter. In this chapter, we will explore the three phases of matter.