Compléter Complete the sentences.Version en ligne Choose the correct word to complete sentences about rocks and minerals. par Raquel Serrano Barrueta 1 crystals small colour lava cools rock minerals Rocks materials large lava are clusters of and other inorganic . Minerals are structured that have specific chemical components . Igneous rocks form when molten from volcanoes cools down . If the cools quickly , crystals form and the rock has dots of . If the lava slowly , crystals form and the looks the same colour all over . Sedimentary rocks and fossils compact over millions of years . Metamorphic rocks form when igneous and sedimentary rocks are pushed down by other layers of rock from above .
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