Weegy: Volcanoes are formed by the accumulation of magma (molten rock that forms below a planet's surface). Magma can erupt through volcanic vents. As magma forms, it rises and accumulates in underground reservoirs before it erupts onto the surface. [ With each eruption, the erupted material adds another layer to the growing volcano. ]
User: The seven continents used to be one huge supercontinent called
Weegy: Pangaea (also spelled Pangea or Pang a) is a theoretical supercontinent that existed about 250 million years ago. Scientists believe all seven continents as they are today were once part of a supercontinent and have slowly moved apart.
]
User: The seven continents used to be one huge supercontinent called
Weegy: Pangaea
(More)