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 ​

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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

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!