Arrange the following steps in the correct order to describe the phase transition of a substance from solid to gas: A. Sublimation occurs, B. Solid state is heated, C. Pressure decreases, D. Gas state is reached.

To start, the solid is heated so its molecules gain energy (B). As the temperature rises, the surrounding pressure drops, allowing the solid to transition directly (C). At that point the solid turns straight into gas, a process called sublimation (A). Finally, the substance is now in the gas state (D). For example, when dry ice warms in a low‑pressure container, it skips the liquid phase and becomes carbon dioxide gas.