Download Igneous Rock

www.mahendraguru.com
www.mahendraguru.com
www.mahendraguru.com
Rock Definition
Naturally occurring solid aggregate of one or more
minerals or mineraloids is called rock.
Such as quartz, feldspar and biotite minerals.
There are basically three types of rocks-
1-Igneous Rock
Igneous rock is formed through the cooling and
solidification of magma or lava.
Example-andesite, basalt, obsidian, pumice, rhyolite,
scoria, and tuf.
www.mahendraguru.com
www.mahendraguru.com
Intrusive igneous rock-Intrusive igneous rocks
crystallize below Earth's surface and the slow cooling
that occurs there allows large crystals to form.
Examples of intrusive igneous rocks are diorite, gabbro,
granite, pegmatite and peridotite.
Extrusive igneous rock -Extrusive igneous rocks erupt
onto the surface where they cool quickly to form small
crystals. Examples- Andesite,Basalt , Obsidian and
Granite.
www.mahendraguru.com
www.mahendraguru.com
2-Sedimentry Rock
Transformation of a pre-existing rock. The original rock
is subjected to very high heat and pressure, which
cause obvious physical or chemical changes. Examples
of these rock types include marble, slate, gneiss, schist.
3-Metamorphic Rock
Transformation of a pre-existing rock by obvious
physical or chemical changes to very high heat and
pressure.
Examples- marble, slate, gneiss, schist, chalk, and
quartazite .
www.mahendraguru.com
www.mahendraguru.com
How rocks transformed
www.mahendraguru.com
www.mahendraguru.com
FORMATION OF ROCKS
Igneous Rocks
Rock
transformed to Metamorphic
Besalt
Sist
Besalt
Amphibolighte
Granite
Sedimentary Rock
Rock
Nice
,,
Metamorphic
Shale
Slate
Lime stone
Marbale
Chalk and Dolomite
Marbale
Sand stone
Quartazite
Metamorphic Rock
Rock
,,
Metamorphic
www.mahendraguru.com
www.mahendraguru.com
Slate
Fylite
Phylite
Silt
Gabro
Sarpentine
QUESTION NO-1-Rocks are broken up into three major groups:
A: magma, metamorphic, and minerals
B: igneous, metamorphic, and sedimentary
C: sedimentary, sand, and igneous
D: sand, mud, and silt
QUESTION NO-2-Rocks that come out of volcanoes form the greater part of the Earth's crust.
These rocks are:
A: igneous rocks
B: basalt
C: metamorphic rocks
D: granite
QUESTION NO-3-From deep within the earth molten magma bubbles up, heating rocks t hat
surround it. This process turns igneous and sedimentary rocks:
A: gneiss
B: slate
C: marble
D: metamorphic rocks
QUESTION NO-4-This is the name of the solid rock beneath the soil:
A: extrusive rock
B: limestone
C: bedrock
D: granite
www.mahendraguru.com
www.mahendraguru.com
QUESTION NO-5-Mud, silt, and sand are all:
A: glassy
B: sediments
C: fossil fuels
D: in clouds that come out of volcanoes
QUESTION NO-6-Coal is a sedimentary rock made up of organic matter that has become solid.
Unlike limestone, coal is made up of:
A: plant fossils
B: shells
C: insects
D: dinosaurs
QUESTION NO-7-You can group igneous rocks by the sizes of grains in them. Coarse grained
rocks are ____ and fine grained rocks are ____.
A: intrusive; extrusive
B: crystals; minerals
C: volcanic; metamorphic
D: intrusive; only made of silica
QUESTION NO-8-Diamonds, like many rocks that come from natural resources, are made of
compressed:
A: quartz
B: aluminium
C: carbon
D: kimberlitic
QUESTION NO-9-What do all rocks have in common?
A: same size
B: same colour
C: they all have minerals
D: same shape
www.mahendraguru.com
www.mahendraguru.com
QUESTION NO-10-What is the difference between a rock and a mineral?
A: A mineral is more valuable
B: A rock is made of minerals
C: A rock is prettier
D: A and B
QUESTION NO-11-Minerals have different properties that help scientists identify them. Which
is not a property used to identify minerals?
A: colour
B: hardness
C: size
D: lustre
QUESTION NO-12-Which rock forms from melted rock - either from magma below Earth 's crust
of from lava above it?
A: Sedimentary
B: Igneous
C: Metamorphic
D: aluminium
QUESTION NO-13- Which of the following is true about rocks?
A.
Rocks are composed of only one mineral.
B.
Rocks do not contain minerals.
C.
Coal is not considered a rock.
D.
Most rocks are a mixture of minerals.
QUESTION NO-14A.
Igneous
B.
Sedimentary
C.
Magma
D.
Metamorphic
Which of the following is NOT one of the three types of rock?
www.mahendraguru.com
www.mahendraguru.com
QUESTION NO-15- Metamorphic rock forms as a result of
A.
Heat and pressure
B.
The cooling of magma
C.
Compaction of sediments
D.
The melting of rock
QUESTION NO-16- A rock that forms when magma hardens beneath Earth's surface is called an
A.
Intrusive metamorphic rock.
B.
Intrusive igneous rock.
C.
Extrusive sedimentary rock.
D.
Extrusive igneous rock.
QUESTION NO-17-Which of the following is an example of an extrusive igneous rock?
A.
Basalt
B.
Coal
C.
Sandstone
D.
Granite
QUESTION NO-18- Lava that cools so quickly that crystals do not have time to form will lead to
igneous rocks with a
A.
Porphyritic texture.
B.
Coarse-grained texture.
C.
Glassy texture.
D.
Fine-grained texture.
QUESTION NO-19- Which of the following represent the correct order of the processes
responsible for the formation of sedimentary rocks?
A.
Erosion, weathering, compaction, cementation, deposition
B.
Compaction, cementation, deposition, weathering, erosion
C.
Deposition, cementation, compaction, er osion, weathering
D.
Weathering, erosion, deposition, compaction, cementation
www.mahendraguru.com
www.mahendraguru.com
QUESTION NO-20- Fossils are found only in
A.
Intrusive igneous rocks.
B.
Extrusive igneous rocks.
C.
Sedimentary rocks.
D.
Metamorphic rocks.
ANSWER KEY:
1-B
2-A
3-C
4-A
5-B
6-A
7-A
8-C
9-C
10-D
11-C
12-B
13-D
14-C
15-A
16-D
17-A
18-C
19-D
20-C
www.mahendraguru.com