1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:Are all minerals valuable?How do geologists find out about t...How do geologists study minerals?How hard are minerals?Why do some rocks form in layers?Why do minerals form shapes?*How are igneous rocks made?*How are metamorphic rocks made?What are fossils?What is hard rock geology?How do geologists date rocks?What is soft rock geology?What are gems?What is a mineral? How are igneous rocks made? Igneous rocks form when hot, molten masses from the Earth's interior come close to the surface, or burst out from volcanoes, and cool. The minerals crystallise out of the molten mass, bind together and form an 'igneous rock'. Mineral crystals   Previous: Back Book: 1001 Section: Earth Chapter: Rocks and Minerals