Inside Our Earth — Social Studies STD 7 — Question

Igneous rocks are created from the cooling of molten magma/lava. All other rocks are derived from them, which is why you will also find them referred to as parent rocks on occasion. These were the first type of the rocks formed when the earth was formed. The first rocks on Earth were igneous rocks. Igneous rocks are formed by the cooling and hardening of molten material called magma.