Igneous Rocks
The word igneous means “born from fire.”
Igneous rocks are made of magma.
Magma is a hot liquid inside the Earth. It is melted rock, gases, and minerals.
A nickname for igneous rocks are 'fire rocks.'
Igneous rocks are made of magma.
Magma is a hot liquid inside the Earth. It is melted rock, gases, and minerals.
A nickname for igneous rocks are 'fire rocks.'
How Igneous Rocks Form:
1. When volcanoes erupt, they release magma.
2. When magma reaches the Earth's surface it is called lava.
3. The lava then cools and hardens to become igneous rock.
1. When volcanoes erupt, they release magma.
2. When magma reaches the Earth's surface it is called lava.
3. The lava then cools and hardens to become igneous rock.
Where Igneous Rocks Form:
Some igneous rocks form on the surface of the Earth while others form on the ocean floor.
–These rocks cool quickly.
–They have small crystals.
–Some look glassy.
–Basalt, pumice, and obsidian are examples of igneous rocks.
Some igneous rocks form underground.
–These rocks cool slowly.
–They are usually coarse with large mineral crystals.
–Granite and gabbro are this kind of igneous rock.
Some igneous rocks form on the surface of the Earth while others form on the ocean floor.
–These rocks cool quickly.
–They have small crystals.
–Some look glassy.
–Basalt, pumice, and obsidian are examples of igneous rocks.
Some igneous rocks form underground.
–These rocks cool slowly.
–They are usually coarse with large mineral crystals.
–Granite and gabbro are this kind of igneous rock.
Mr. Flame! Granite Lava Pumice