A "black surface" refers to any flat area that appears black in color. This can include materials like asphalt, paint, or fabric. Black surfaces absorb most of the light that hits them, making them appear darker than other colors. They are often used in design and art to create contrast or to emphasize other colors. In nature, black surfaces can be found in volcanic rocks or certain types of soil. These surfaces can also affect temperature; for example, a black surface can become significantly warmer in sunlight compared to lighter surfaces. This property is important in fields like environmental science and urban planning.