Someone who studies volcanoes is called a ____ Volcanoes and cone-shaped mountains start out as a ____ in the earth's crust Volcanoes can form when plates ____ or ____ . Magma rises from the ____ to fill the space in the ____ When magma wells up from the ____ and reaches the surface, it's known as lava A ____ is the mouth of the volcano The ____ is connected to the magma chamber. It is the main passageway for magma to travel to the earth's surface. A ____ plate boundary is when plates collide There is a narrow chain of mountains in the middle of the Atlantic Ocean called the ____ An ____ volcano is one that's erupted in the past 10,000 years. A ____ volcano has not erupted in the past 10,000 years but is expected to erupt again. An ____ volcano is not expect to erupt again. The ____ is a horseshoe-shaped area containing many plate boundaries

Volcanoes

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