8.12.2-Igneous Rocks

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​Use your textbook to complete your vocabulary.

Vocabulary Review

• Mineral: natural, solid substance that has a definite chemical composition and physical structure

• Magma: melted rock within the earth

• Igneous Rock: forms when magma is pushed up from the mantle into the cool crust and hardens into rock

• Lava: Magma that reaches the surface

Multiple Choice

Where is lava located?

• above ground

• below ground

• in the core

• in the mantle

Multiple Choice

Where is magma located?

• above ground

• below ground

• in the stratosphere

• in the thermosphere

Multiple Choice

Which of these hot, melted substances can be found deep underground?

• magma

• lava

Igneous rocks form from cooling of

• Magma - under Earth crust

• Lava - over Earth's surface

Igneous rocks are formed by cooling of magma or lava

Multiple Choice

Igneous rocks can be found under and above Earth's surface

• True

• False

Magma cools s.l.o.w.l.y

• ALOT of beautiful crystals form

Magma cools s.l.o.w.l.y

• The longer it takes magma to cool, the larger the crystals can get.

• Example: Granite, Pegmatite, Gabbro

Multiple Choice

You can find ALOT of crystals in igneous rocks that cool quickly

• True

• False

What happens if

• Magma cools slowly?

• Magma cools quickly?

Magma cools quickly

Little or no crystals will form

Some AIR may fill the spaces

Example: Pumice ----->

Magma cools quickly

Little or no crystals form

Can cool by the help of ocean water

Example: Basalt ---->

Multiple Choice

You can see large crystals in this igneous rock. This means that magma cooled down _____

• slowly

• quickly

Multiple Choice

the longer the cooling of magma takes, the _______

• smaller or no crystals will form

• larger the crystals formed

Multiple Choice

_____ rocks are formed by the cooling of magma or lava

• Sedimentary

• Igneous

• Metamorphic

Multiple Choice

the longer it takes for magma to cool down, the ______ the crystals formed

• smaller

• larger

Multiple Choice

Igneous rocks are only formed under Earth's crust

• True

• False

Multiple Choice

What are the three different types of rocks?

• Sedimentary, Intrusive and Igneous

• Igneous, Crystal and Metamorphic

• Igneous, Metamorphic and Sedimentary

• Metamorphic, Sedimentary and Quartz

Multiple Choice

What is an igneous rock?

• Rock formed from fossils

• Rock formed from cooling magma

• Rock formed from settling sediments

• Rock formed from the ocean

There are two types of Igneous Rocks​

Multiple Choice

What are the two types of Igneous Rocks

• Intrusive and Extrusive

• Big and Small

• Inside and Outside

• Bubbles and Crystals

Intrusive rocks ​cool slowly...

Multiple Choice

True or False: Do the mineral crystals in an igneous rock interlock like a puzzle?

• True

• False

Multiple Choice

What size are the crystals of intrusive rocks?

• Large

• Small

Multiple Choice

Which rock cools the slowest 

• Intrusive (inside the Earths surface)

• Extrusive (on the Earths surface)

Extrusive rocks cool quickly...​

Multiple Choice

Is Gabbro an intrusive igneous rock?

• Yes

• No

Multiple Choice

What type of rock is Obsidian?

• Intrusive

• Extrusive

Multiple Choice

True or False: Tuff is an intrusive rock

• True

• False

Dropdown

Find the answers on the bottom of the Simulation:

An Igneous rock that forms inside of the earth when ​

Select answer

cools ​

Select answer

is called an ​

Select answer

igneous rock.

An Igneous rock that forms outside of the earth when ​

Select answer

cools ​

Select answer

is called an extrusive igneous rock.

Identfiying Igneous Rocks

Use the simulation and the ESRT below to identify the igneous rocks in the simulation

https://javalab.org/en/igneous_rock_en/

Drag and Drop

 Igneous rocks with ​

Placeholder

grains were created above ground ​

Placeholder

Igneous rocks with ​

Placeholder

grains were created below ground ​

Placeholder

Drag these tiles and drop them in the correct blank above

fine

quickly

coarse

slowly

Multiple Choice

Igneous rock that forms when magma hardens beneath Earth's surface

• Intrusive Rock
• Compaction
• Extrusive Rock

Multiple Choice

Igneous rock that forms from lava on Earth's surface

• Organic Rock
• Intrusive Rock
• Extrusive Rock

Fill in the Blanks

Which type of igneous rock would be easier to mine?

Obsidian is an example of an extrusive rock. Because it cooled and hardened quickly, extrusive rocks have a fine grained texture.

Granite is an intrusive igneous rock. Because they cool slowly, the crystals are large giving these rocks a coarse texture.

Multiple Choice

Diorite is an intrusive igneous rock. What does this tell you about it?

• it was formed from lava that erupted onto Earth's surface

• it was formed from magma that hardened beneath Earth's surface

• it was formed from rapidly cooling lava

Multiple Choice

Basalt is an extrusive igneous rock. What does this tell you about it?

• it was formed from lava that erupted onto Earth's surface

• it was formed from slowly cooling magma

• it was formed from magma that hardened beneath Earth's surface

Multiple Choice

Pegmatite is a coarse-grained, intrusive, igneous rock. How did it form?

• rapidly cooling lava

• slowly cooling magma

Multiple Choice

Rhyolite is a fine-grained, extrusive, igneous rock. How did it form?

• rapidly cooling lava

• slowly cooling magma

Multiple Choice

Is this igneous rock, obsidian, fine-grained or coarse-grained?

• fine-grained

• coarse-grained

Multiple Choice

Is this igneous rock, porphyry, fine-grained or coarse-grained?

• fine-grained

• coarse-grained

Multiple Choice

Formed by cooling & solidification of magma

• Sedimentary
• Metamorphic
• Extrusive Igneous
• Intrusive Igneous

Multiple Choice

Formed by cooling & solidification of lava

• Sedimentary
• Metamorphic
• Extrusive Igneous
• Intrusive Igneous

Multiple Choice

Has large crystals because of slow cooling

• sedimentary rock
• metamorphic rock
• intrusive igneous rock
• extrusive igneous rock

Multiple Choice

Has small or no crystals because of rapid cooling

• sedimentary
• metamorphic
• extrusive igneous
• intrusive igneous

​12 questions related to Igneous rocks to follow

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Multiple Choice

Where is magma located?

• above ground

• below ground

• in the stratosphere

• in the thermosphere

Multiple Choice

Describe the environment of formation for the following igneous rock.

• intrusive

• extrusive

Multiple Choice

Describe the rate of cooling for the following igneous rock (grain size 1-10 mm).

• slow cooling

• rapid cooling

Multiple Choice

Describe the environment of formation for the following igneous rock (grain size 1-10 mm).

• above ground

• below ground

• can’t tell by grain size

Multiple Select

What causes igneous rocks to form?

• pressure

• cooling magma

  and lava

• compaction

• cementation

​3 more questions…

Multiple Choice

Igneous rock that formed when magma hardened beneath the surface of Earth is called _?_ igneous rock.

• extrusive

• intrusive

Multiple Choice

Intrusive rocks that form below the Earth's surface have _?_ or a _?_ texture.

• small crystals, fine-grained

• large crystals, coarse grained

• small crystals, coarse-grained

• large crystals, fine-grained

Multiple Choice

Which of the following igneous rocks is this?

• obsidian

• granite

• scoria

• diorite

​Use the next slide to complete your notes.

​BE SURE TO GO BACK THROUGH SLIDES AND LABEL COMMON ROCKS IN EACH CATEGORY!