KIDS TRIVIA

Detailed explanation-1: -When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly. Crystals inside solid volcanic rocks are small because they do not have much time to form until the rock cools all the way, which stops the crystal growth.

Detailed explanation-2: -When lava reaches the surface of the Earth through volcanoes or through great fissures the rocks that are formed from the lava cooling and hardening are called extrusive igneous rocks. Some of the more common types of extrusive igneous rocks are lava rocks, cinders, pumice, obsidian, and volcanic ash and dust.

Detailed explanation-3: -When volcanoes erupt, hot lava drips on the side of volcanoes then cools and hardens. This becomes igneous rocks like granite. Igneous rocks can also form deep inside the Earth from magma.