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WHAT CAUSES THE VOLCANO ERUPTION? ORIGINALLY, THE INTERIOR OF THE EARTH IS FULFILLED WITH HOT MAGMA AND THE SWOLLEN BUBBLE. UNDER THE EXTREME PRESSURE, THE MAGMA WILL BREAK THROUGH THE EARTH FROM THE VERY WEAK POINT AND SPOUT OUT. THAT CAUSES THE VOLCANO ERUPTION. THIS IS ONE DIY EXPERIMENTAL DEVICE. ABOUT VOLCANO ERUPTION. THE CHILDREN CAN WITNESS THE WHOLE PROCESS OF VOLCANO ERUPTION AND KNOW ITS WORKING PRINCIPLE THROUGH DOING THE EXPERIMENT BT THEMSELVES AND THEY WILL ENJOY THE GREAT FUN FROM THIS EXPLORATION.
