Igneous rocks are called fire rocks and are formed either underground or above ground. Underground, they are formed when the melted rock, called magma, deep within the earth becomes trapped in small pockets. As these pockets of magma cool slowly underground, the magma becomes igneous rocks. Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground.
Igneous rocks form when molten lava (magma) cools and turn to solid rock.
The magma comes from the Earth’s core which is molten rock .
The core makes up about 30% of the Total Earth Mass (31.5%)
**obsidian** is nature’s glass. It forms when lava cools quickly on the surface. It is glassy and smooth.
**pumice** is full of air pockets that were trapped when the lava cooled when it frothed out onto the surface.
It is the only rock that floats.
Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground.
The magma comes from the Earth’s core which is molten rock .
The core makes up about 30% of the Total Earth Mass (31.5%)
It is the only rock that floats.
Minerals in Igneous Rocks