© Boardworks Ltd 2005 1 of 26 These icons indicate that teacher’s notes or useful web addresses are available in the Not This icon indicates the slide contains activities created in Flash. These activities are not edit For more detailed instructions, see the Getting Started presentat 1 of 26 © Boardworks Ltd 2005 Geology
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Dec 16, 2015
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© Boardworks Ltd 20051 of 26
These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page.
This icon indicates the slide contains activities created in Flash. These activities are not editable.
For more detailed instructions, see the Getting Started presentation.
1 of 26 © Boardworks Ltd 2005
Geology
© Boardworks Ltd 20052 of 26
What are the different types of rock?
How are igneous rocks formed?
How are sedimentary rocks formed?
How are metamorphic rocks formed?
What is the rock cycle?
Lea
rnin
g o
bje
ctiv
es
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There are 3 types of rock:
Sedimentary
Metamorphic
Igneous
Types of rock
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What are the different types of rock?
How are igneous rocks formed?
How are sedimentary rocks formed?
How are metamorphic rocks formed?
What is the rock cycle?
Lea
rnin
g o
bje
ctiv
es
© Boardworks Ltd 20055 of 26
Extrusive igneous rocks are cooled quickly so small crystals form (e.g. basalt).
Intrusive igneous rocks are cooled more slowly so large crystals form (e.g. granite).
Igneous rocks are formed by the solidification of molten material from below the earth's surface.
Igneous rocks
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Granite
Basalt
What differences do you notice between these two igneous rocks?
Granite has visible crystals.
Igneous rocks – crystal size
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Igneous rocks
Basalt
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Granite
Igneous rocks
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Basalt pillars
These pillars were formed when lava cooled on the Earth’s surface.
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What are the different types of rock?
How are igneous rocks formed?
How are sedimentary rocks formed?
How are metamorphic rocks formed?
What is the rock cycle?
Lea
rnin
g o
bje
ctiv
es
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Sedimentary rocks
Sedimentary rocks are made from layers of sediment. They are grainy and crumbly and may contain fossils.
Examples of sedimentary rocks are sandstone and limestone.
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Sedimentary rock – sedimentation
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sandstone
limestone chalk
sandstone
Sedimentary rocks
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Sedimentary rocks
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What are the different types of rock?
How are igneous rocks formed?
How are sedimentary rocks formed?
How are metamorphic rocks formed?
What is the rock cycle?
Lea
rnin
g o
bje
ctiv
es
© Boardworks Ltd 200516 of 26
Metamorphic rocks are formed by the effect of extreme pressures and temperatures deep within the Earth.
This alters the structure of the existing rock.
Metamorphic rock - formation
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Metamorphic rocks
Metamorphic rocks show small crystals in layers (bands).
Metamorphic rocks are hard and smooth.
Examples of metamorphic rocks are slate and marble.
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marble
slate
Metamorphic rocks
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Continent collision causes metamorphism and huge folds like this one in Scotland.
Metamorphic rocks
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Match the rocks with the correct label
B
A C D
3 granite1 slate 4 chalk2 basalt
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Which type of rock am I?
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What are the different types of rock?
How are igneous rocks formed?
How are sedimentary rocks formed?
How are metamorphic rocks formed?
What is the rock cycle?
Lea
rnin
g o
bje
ctiv
es
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From weathering to sedimentation
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Rock formation
sea
volcano
Igneous rocksbasalt
Igneous rocksgranites
rocks riseto surface by
uplift and erosion
rocks are broken up by the action of weather
magma
Metamorphic rocks slate and marble
Sedimentary rocksmudstone
slowsolidification
high pressureand temperature
transportationand deposition
rises to surfacewhere it
cools rapidly
melt
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Rock cycle
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Do you know your rock cycle?
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