Molten lava is a hot, liquid rock that erupts from volcanoes during an eruption. It forms when the Earth's mantle heats up and melts the rock, creating a glowing, viscous substance that can reach temperatures of up to 2,200°F (1,200°C). As it flows down the sides of a volcano, lava can range in color from bright orange to deep red, depending on its temperature. Once it cools and solidifies, it forms new volcanic rock. The movement of molten lava is slow, but it can be incredibly destructive, as it can burn everything in its path.
