Transcript Extrusive igneous rock

Igneous Rocks
Eric Angat
Teacher
Essential Question
How do I
identify an
igneous rock?
Instructions
1. Answer the clarifying questions individually
(20 minutes).
When done in answering all 15 questions, your
teacher will tell you to group yourselves together
and then distribute the bags of igneous rocks.
2. Read and follow the instructions. Talking too much
deprives you and others of needed learning so you
need to be quiet and focus on the task at hand. You
will receive a consequence such as detention or ISS
if you do not follow instructions.
3. Observe each rock and record your observations on
your activity papers.
Felsic
Mafic
Igneous
rock
Igneous
rock
Extrusive igneous rock-on the surface
Intrusive igneous rock( pluton) underground
Small
Crystals
Big
Crystals
1. What is rock texture?
The texture of a rock refers to its
grain or mineral crystal size.
Big crystals Small
crystals
Coarse texture
Fine texture
MIXED FINE
AND
COARSE
Porphyritic
texture
1. What is rock texture?
The texture of a rock refers to
its grain or crystal size.
Very small
crystals
Glassy texture
Big pores
or holes.
Vesicular texture
Brecciamixture of
large and
small grains.
Pyroclastic
texture
MIXED
FINE AND
COARSE
Porphyritic
texture
Brecciamixture of
large and
small angular
grains.
Pyroclastic
texture
2. How do Igneous rocks form?
Extrusive rocks- example is basalt.
Intrusive rocks- example is granite.
3. What are the types of Igneous Rocks
http://2ref.info/?w=Bing+Images+www.bing.com%3A80%2Fimages%2Fsearch
Cooled lava forms basalt
igneous rocks
Moai Statues (Easter Island)
Basalt, trachyte, and scoria
Mount Rushmore (USA)
Granite
Cooled magma form
granite igneous rocks
The two types igneous rocks
https://www.youtube.com/watch?v=PrN7jygu4cQ
4. How do igneous rocks form from subduction?
1.Oceanic
lithosphere
sinks to the
asthenosphere.
subduction
volcanoes
3.Lava
cools to
become
extrusive
rocks.
2.Magma
cools
to
Plate melts
to
become
become
intrusive
magma. rocks.
To compare relative sizes
5. The parent material
for all rocks is
A. silica
B. quartz
C. granite
D. magma
6. Which of the following types
of rock is produced by magma
that cools deep below the
earth's crust?
A. extrusive igneous
B. intrusive igneous
C. foliated metamorphic
D. chemical sedimentary
7.The size and
arrangement of crystal
grains in igneous rocks is
called
A. density
B. texture
C. hardness
D. luster
8.The texture of igneous
rock is determined by the
rate at which magma
A. flows from a volcano
B. cools Slow cooling =big crystals
Fast cooling=small crystals
C. melts
D. compresses
9. An igneous rock with a
mixture of large and
small grains is
A. a porphyry
B. an intrusion
C. an extrusion
D. a breccia
10. An igneous rock that is
dark colored and has big
crystals.
A.Felsic, intrusive, fine crystals
B.Mafic, extrusive, coarse grain
C.Mafic, intrusive, coarse grain
D.Felsic, extrusive, fine grain
What is the Rock Cycle?
https://www.youtube.com/watch?v=55n_ep952ro