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How Volcanoes Form

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Deep beneath Earth's crust lies hot, partly melted rock called magma. Because magma is lighter than the solid rock around it, it slowly rises. Where tectonic plates pull apart or push under one another, magma can find cracks and collect in chambers. When pressure builds high enough, it bursts through the surface as lava, ash and gas. Over thousands of eruptions, these layers pile up to form the cone-shaped mountains we call volcanoes.

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Informative paragraphs on everyday topics, with capitals, commas and full stops. This one is rated hard and has 73 words. At an average speed of 40 wpm it takes about 2 minutes to type.

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Deep beneath Earth's crust lies hot, partly melted rock called magma. Because magma is lighter than the solid rock around it, it slowly rises. Where tectonic plates pull apart or push under one another, magma can find cracks and collect in chambers. When pressure builds high enough, it bursts through the surface as lava, ash and gas. Over thousands of eruptions, these layers pile up to form the cone-shaped mountains we call volcanoes.