Does anybody know any GOOD facts about volcanoes? ?
Volcanoes are openings in the surface of the Earth from which gas and hot molten, or liquid, rock escape and cover the surrounding land. Some volcanoes are simply long cracks in the ground. Others look like cone shaped mountains with a hole in the top. The hole is called a vent. When molten rock is inside the Earth, it is known as magma. But when it escapes onto the Earth’s surface, it is called lava. As lava flows, it cools and hardens. The hardened lava, as well as ash and cinders from the volcano, pile up around it to form a cone shape. A volcanic eruption is a spectacular and often terrifying sight. Red-hot lava may burst out of the volcano with a deafening roar creating beautiful but deadly fire fountains of glowing lava which shoot hundreds of metres into the air. Lava is either very runny, or stiff and thick. Different volcanoes produce these different lava types. But some volcanoes produce no liquid lava at all. Instead they shoot out solid pieces of rock. On average, between 2
