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A LITTLE SOMETHING WORTH KNOWING

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ScienceOne small ahaEarth or weather concept

These openings vent molten rock, ash, and gases, often near tectonic-plate boundaries.

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Your new ahaVolcanoes

Volcanoes: Release molten rock, ash, and gases from below the surface. Source: Volcano

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  2. 17This cycle transforms rock among igneous, sedimentary, and metamorphic forms.RECALL
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    The rock cycle describes how rock transforms between igneous, sedimentary, and metamorphic forms over vast timescales.

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  3. 18This earlier theory proposed that continents had moved apart from a single ancient landmass.RECALL
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    Continental drift proposed a single ancient landmass, an idea later explained more fully by plate tectonics.

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