Volcanoes are openings in the Earth's crust that often look a lot like mountains. They allow molten rock, or hot, liquid rock, from inside the Earth, to reach the surface. Volcanoes
erupt, spewing out molten rock, ash and gas. Molten rock is called magma when it's beneath
the surface of the Earth and then called lava when it comes out during an eruption.
Volcanoes aren't only found on land! Many are located underwater on the ocean floor.
Islands are formed by underwater volcanoes. As underwater volcanoes erupt over time,
layers of lava can pile up and break through the surface of the water, creating islands. This is
how the Hawaiian islands in the Pacific Ocean were created.
What is the difference between magma and lava?
A Magma is molten rock. Lava is solid rock.
B
Magma can form islands. Lava can form mountains.
с
Lava comes from erupting volcanoes. Magma comes from melting islands.
D
Lava is molten rock above ground. Magma is molten rock below ground.
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