Answer:
1. A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth.
2. The danger area around a volcano covers about a 20-mile radius.
3.In an eruption, gases and rock shoot up through the opening and spill over or fill the air with lava fragments.
4.An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows and rockfalls.
5.There are more than 500 active volcanoes in the world. More than half of these volcanoes are part of the "Ring of Fire," a region that encircles the Pacific Ocean.[8]
Explanation:
