EVERYDAY SCIENCE

Detailed explanation-1: -Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

Detailed explanation-2: -Intrusive igneous rocks form when magma cools slowly below the Earth’s surface and solidifies.

Detailed explanation-3: -Igneous rocks are formed from the solidification of magma, which is a hot (600 to 1, 300 °C, or 1, 100 to 2, 400 °F) molten or partially molten rock material. Earth is composed predominantly of a large mass of igneous rock with a very thin veneer of weathered material-namely, sedimentary rock.

Detailed explanation-4: -The magma that comes to the surface of the Earth and solidifies forms fine-grained rocks like basalt. Basalt is a dark-colored igneous rock. Granite and Basalt are widely used for the construction of roads and buildings. Extrusive igneous rocks form when lava reaches the Earth’s surface a volcano and cools quickly.

Detailed explanation-5: -When the molten magma cools, it becomes solid. Rocks thus formed are called igneous rocks. Igneous rocks are of two types-intrusive igneous rocks and extrusive igneous rocks. This classification is based on the location in which these rocks are formed.