Geology 1C: Igneous Rocks

Match the following!

• Extrusive Rock

• The most common type of INTRUSIVE rock.

• Intrusive Rock

• Igneous rocks that form from lava that has erupted onto Earth's surface.

• Fire

• The most common type of EXTRUSIVE rock.

• Basalt

• Igneous rocks that form from magma that has hardened beneath Earth's surface.

• Granite

• The word IGNIS means...

How did each rock picture most likely form?

a

b

Cooled slowly!

Cooled quickly!

Label each rock based on mineral size!

a

b

Extrusive

Intrusive

Intrusive rocks usually have ​ (a)   mineral crystals than ​ (b)   rocks because they cool ​ (c)   ​ (d)   Earth's surface!

• larger
• slowly
• beneath
• smaller
• quickly
• above
• extrusive
• lava

Extrusive rocks usually have ​ (a)   mineral crystals than ​ (b)   rocks because they cool ​ (c)   ​ (d)   Earth's surface!

• larger
• slowly
• on top of
• smaller
• quickly
• above
• intrusive
• inside
• big

Organize these options into the right categories!

Groups:

(a) TRUE STATEMENTS

,

(b) FALSE STATEMENTS

• Pumice is an abrasive igneous rock.

• Basalt is often found in Continental crust.

• Obsidian forms from magma that cools slowly.

• The word IGNIS means "melt" in Latin.

• Egyptians used granite over 35,000 years ago.

• Igneous rock texture depends on mineral size.

• Perlite can be used to help seeds grow.

• Igneous rocks have long been used as tools.

How many years ago did Earth appear as a charred and bubbling marshmallow heated over hot coals?

• 4.6 billion years ago

• 46 million years ago

• 6.4 billion years ago

• 64 millions years ago

• 4.6 years ago

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NGSS.MS-ESS2-2

NGSS.MS-ESS1-4

Where would intrusive igneous rocks be found?

Tags

NGSS.MS-ESS2-1

Where would rocks with LARGER minerals be found?

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Where would magma be found?

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NGSS.MS-ESS2-2