Effervescence refers to the process of bubbles forming and rising to the surface of a liquid, often seen in carbonated beverages like soda or sparkling water. This phenomenon occurs when carbon dioxide gas is dissolved in the liquid under pressure. When the pressure is released, such as when a bottle is opened, the gas escapes, creating bubbles that rise and create a fizzy effect. In addition to drinks, effervescence can also occur in chemical reactions, where gas is produced as a byproduct. For example, when baking soda reacts with vinegar, it produces carbon dioxide, resulting in bubbling and fizzing. This reaction is often used in science experiments to demonstrate chemical changes.