IGNEOUS ROCKS

By Sophia Carter and Danny Lee

HOW IGNEOUS ROCKS ARE

FORMED

Igneous rocks are rocks formed by the cooling, hardening, and the

freezing of lava or magma

Igneous rocks may or may

not crystallize while cooling

Most of the 700 igneous rocks

are formed under the Earth’s crust

THE ROCK TYPES AND

THEIR DIFFERENCES

Igneous

Sedimentary

Metamorphic

The difference between igneous and metamorphic is that the metamorphic rocks are

formed under pressure and igneous rocks are just cooled off lava/magma.

The difference between igneous and sedimentary rocks are that sedimentary rocks

are made of different rocks, animal parts, and plants mushed together to make one

rock.

Intrusive rocks:

Solidified inside the

Earth’s surface

As the active volcano

turns into a extinct

volcano, the lava /magma

inside hardens and

becomes a Intrusive

Igneous rock

INTRUSIVE AND EXTRUSIVE

ROCKS

Extrusive rocks:

Solidified above the

Earth’s surface.

First a volcano erupts or

magma/lava oozes out

the volcano. Then the

magma/lava cools or

hardens to form a

extrusive igneous rock

Extrusive rocks:

Basalt

Obsidian

Pumice

Rhyolite

Scoria

TYPES OF INTRUSIVE AND

EXTRUSIVE IGNEOUS ROCKS

Intrusive rocks:

Diorite

Gabbro

Pegmatite

Granite

THE ROCK CYCLEThis is the rock cycle:

WE HOPE YOU WERE

LISTENING! THAT’S BECAUSE

THERE IS GOING TO BE A

QUIZ!

QUIZ!

What rock is this rock?

Is a Gabbro an intrusive or an extrusive rock?

What’s the difference between an intrusive and a extrusive rock?

Who are the authors of this PowerPoint?

A JOKE

Q=What music does rocks like best?

A=rock & roll!

WORDS YOU MAY NOT

KNOW/INDEX

Crystallize- A form of a rock slowly or quickly turned into a

crystal/rock

lava/magma-a liquid that is formed inside a volcano, and when

cooled off it’s turned into a igneous rock

Sophia-wisdom

Danny-Clear water of the East Sea

ANY QUESTIONS?

Ask a question

Or we’ll tickle this cute

kitty!

APPLAUSE FOR US!

(Please)