Bellringer: Get your clickers and a Coach book. Complete Lesson 5 in the Coach Book. Read the information and answer the 4 questions. Put your answers in the clicker.

Review Rock Cycle Worksheet (SP#2)Notes on Igneous Rocks (SP#3)

TODAY’S AGENDA…

What is created when sedimentary rock is under heat and pressure?

What is created when igneous rock is weathered or eroded?

What is created when sedimentary rock is melted?

What is created when metamorphic rock is melted and then cooled?

UNDERSTANDING THE ROCK CYCLE

What is created when igneous rock is under heat and pressure?

What is created when metamorphic rock is weathered and eroded?

What is created when magma cools?

What is created when sediment is compacted and cemented?

UNDERSTANDING THE ROCK CYCLE

Book on page 62Paper (Study Pack #3)

WHAT YOU NEED…

Study Pack #3

IGNEOUS ROCKS

I can recognize magma and lava as the materials that cool to form igneous rocks.

I can contrast the formation of instrusive and extrusive igneous rock.

I can contrast granitic, basaltic, and andesitic igneous rock.

TODAY’S GOALS…

Layers of the EarthCrust – outer most layerMantle – molten rock (magma)Outer Core – melted metalInner Core – solid metal ball that spins

INSIDE THE EARTH

INSIDE THE EARTH

When hot magma cools and hardens it forms igneous rockIgneous means “fire”

FORMATION OF IGNEOUS ROCKS

Magma comes from deep below Earth’s surface and is pushed upward because it is less dense than surrounding rock

When magma reaches earth’s surface it is called lava

FORMATION OF IGNEOUS ROCKS

Split into two groupsIntrusive Igneous RocksExtrusive Igneous RocksHow do they compare?

TYPES OF IGNEOUS ROCKS

Figure 6 on page 63Rocks that form from magma below the surfaceFound only when the layers of rock and soil above them are worn away

Takes a long time for them to coolCreate visible mineral grainsCoarse grained

INTRUSIVE ROCKSINTRUSIVE ROCKS

INTRUSIVE ROCKS

Formed as lava cools on the Earth’s surface

Air and water cause it to cool more quicklyKeeps mineral grains from growing large

Fine grained

EXTRUSIVE ROCKSEXTRUSIVE ROCKS

EXTRUSIVE ROCKS

COMPARE THEM!

Page 64What is the difference between intrusive and extrusive igneous rock?

TYPES OF IGNEOUS ROCKS

Some rocks cool so quickly they have few or no mineral grains present

Some of the gases can also be trapped in the rocks and form holes

VOLCANIC GLASS

You can also classify these rocks by the magma from which they formBasalticAndesiticGranitic

What are the differences?

CLASSIFYING IGNEOUS ROCKS

DenseDark coloredMade up of iron and magnesiumBlack beach in Hawaii

BASALTICBASALTIC

Light-coloredLower density than basalticThick and stiffLots of silicaCan cause explosive eruptions

GRANITICGRANITIC

Characteristics between basaltic and granitic

ANDESITICANDESITIC