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A Mountain ThatA Mountain That RumblesRumbles A Mountain That RumblesSome mountains sit quietly for thousands of years. Some mountains rumble, steam, and glow. These fiery mountains are called volcanoes. A volcano is an opening inA volcano is an opening in Earth where hot meltedEarth where hot melted rock can escape.rock can escape. A volcano is an opening in Earth where hot melted rock can escape. 1
Where AreWhere Are Volcanoes Found?Volcanoes Found? Where Are Volcanoes Found?tectonic plates.tectonic plates.tectonic plates. Many volcanoes are found near the edges of giant pieces of Earth’s crust called tectonic plates. These plates move very slowly. When plates bump, pull apart, or slide, volcanoes can form. volcanoesvolcanoesvolcanoes 9
Earth’s FieryEarth’s Fiery WondersWonders Earth’s Fiery WondersVA volcano is not just a mountain. It is a window into the fiery world below.. 18 Volcanoes are powerful parts of Earth. They can destroy, create, shape, and change the land. From glowing lava to deep magma chambers, volcanoes show that Earth is always moving.
GlossaryGlossaryGlossaryWord Meaning Volcano An opening in Earth where magma, gas, ash, or lava can escape Magma Hot melted rock beneath Earth’s surface Lava Magma that reaches Earth’s surface Eruption When a volcano releases lava, ash, gas, or rocks Ash Tiny pieces of rock and glass from a volcano Crater The bowl-shaped opening at the top of a volcano Vent A passage where magma travels through a volcano Tectonic plates Huge moving pieces of Earth’s outer layer Volcanologist A scientist who studies volcanoes Dormant Quiet for a long time but able to erupt again Extinct Not expected to erupt again 19