Degrees Celsius (°C) is a unit of measurement used to express temperature. It is part of the metric system and is widely used around the world, especially in scientific contexts. The scale is based on the freezing point of water at 0°C and the boiling point at 100°C under standard atmospheric conditions. This makes it easy to understand temperature changes in everyday life, such as weather forecasts. In addition to weather, degrees Celsius is commonly used in cooking, where precise temperatures can affect the outcome of a dish. For example, baking bread often requires an oven temperature of around 180°C. Understanding °C helps people make informed decisions about their environment and activities.