1. What are igneous rocks?
All rocks on Earth were initially igneous. Igneous rocks form as liquid magma cools, forming crystal structured rocks.
There are many different types of igneous rocks.
Ignis means fire
(ignite, ignition)

2. Either deep within Earth or on Earth’s surface.
Where do they form?
Either deep within Earth or on Earth’s surface.

4. Two Types of Igneous Rocks
Scientists divide igneous rocks into two different categories.
Those which were cooled below the surface are called intrusive rocks
Those which cooled on the surface are referred to as extrusive rocks.

5. Extrusive- Exit, Exoskeleton,exterior
Igneous Rocks- Word Connections
Extrusive- Exit, Exoskeleton,exterior
Intrusive-inside, intrude,interior
Coarse- rough
Fine - smooth

6. Intrusive/Inside Granite(Intrusive)
most common -intrusive igneous rocks.
forms when a pocket of magma slowly cools down
Turns into solid rock beneath earth’s surface
Coarse/large grain crystals
You can see the crystals

7. Intrusive
If you look closely at a piece of granite you will see little flecks of white, black, gray, and sometimes pink. These flecks of color are crystals
Coarse Grained Crystals

8. Extrusive
Igneous rock formed from lava that has flowed out onto the Earth’s surface.
Solidifies fast
Cools rapidly
Small/fine grains
Ex-basalt/obsidian
Can’t see the crystals

12. Obsidian(Volcanic Glass)
Extrusive
Obsidian(Volcanic Glass)

13. Name of Rock
Basalt
Granite
Type of Igneous
extrusive
intrusive
Texture
Glassy or fine
Course,rough
Crystals
Small crystals
Large Crystals

15. Petraologists study igneous rocks Field observations
Careers in Science
Petraologists study igneous rocks
Field observations
Laboratory studies
Geochemical analyses and experiments