Transcript What do we use rocks for?

Igneous Rocks
• Rocks that are formed from cooled lava and
magma
Igneous =
“born from
fire”
Intrusive Rocks
1. Intrusive rocks are formed when magma
cools inside the earth.
Examples: granite and gabbro
Extrusive Rocks
2. Extrusive rocks are formed when lava cools on
Earth’s surface.
Examples: Pumice, basalt, obsidian
Label where the intrusive and extrusive rocks
would form…
How do intrusive rocks find their
way to the surface?
• Page 86
Venn Diagram
Intrusive
Extrusive
Read pages 83-84 and add facts
to a Venn Diagram.
• How can you tell, based on looks alone,
whether or not an igneous rock is intrusive or
extrusive?
Create a comic that illustrates how each of
the following rocks form:
• Igneous rocks (in general)
• Intrusive igneous
• Extrusive igneous
Exit Ticket
• How is an igneous rock formed?
• Draw a picture of a volcano and label where
an intrusive and an extrusive igneous rock
would be found.
• HOMEWORK: Find at least one igneous rock
and bring it to school tomorrow. (Figure out if
it is extrusive or intrusive)