Chapter 5 Rocks
• Explain the formation of igneous, sedimentary
and metamorphic rock
• Name and give examples of three different
rock types.
• Explain the rock cycle
• Discuss human interaction with the rock cycle
using a case study
• Know how this topic appears on the exam
paper.
Rocks
Before we start our chapter…. Lets have a
recap on the three rock groups

http://www.youtube.com/watch?v=G7A
WGhQynTY
Key Words
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Igneous
Basalt
Granite
Sedimentary
Sandstone
Limestone
Metamorphic
Quartzite
Marble
Schist
Gneiss
Igneous Rock Keywords
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Plutonic Rock (intrusive)
Volcanic Rock
Magma
Crystals
Solidified
Igneous Rock
• The two examples we are going to use are
Granite and Basalt.
• Read page 43 of your book.
• In your groups write the characteristics of
granite and the characteristics of basalt.
Class Activity: Fill out the table
Rock
Location
Crystals
Colour
Cools
Example
Sedimentary Rock
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Organically formed rock
Inorganically formed rock
Accumulation
Strata
Lithification
Bedding planes
Sedimentary Rock is all about layers!!
• Layers of rock fragments, the remains of animals and plants are
layered on top of each other.
• The rock forms when these layers all made from the build up or
accumulate of layers of inorganic (rock fragments) or organic
sediments (once living).
• Each layer is called strata and they are laid down on bedding
planes.
• The layers get compressed by pressure and the water and air is
pushed out.
• They get compacted and are cemented or stuck together by
silica or calcite to form solid rock
• This is called lithification (turning sediment into stone)
Examples
Inorganic:
Sandstone, shale and conglomerates
Organic:
Limestone, chalk and coal.
Discovery learning:
Each group will be given a rock type to
investigate. You will present your findings to the
class.
What you need to do
• Name the rock and give the location.
• Explain how the rock is formed
• Describe the appearance.
**Write down notes into your copies about
what you have learnt about each of the rock
types**
Homework
• Summarise sedimentary rocks into your
copies.
Metamorphic rocks
• Metamorphic rocks
behave just like
the……….
Humans changing or morphing into
power rangers
• http://www.youtube.com/watch?v=C1UtsY0uZ
Vk
• Metamorphic rocks are just like the power
ranges. They are made from igneous or
sedimentary rocks that change or ‘morph’ into
new rock called metamorphic rock
Movements of the Earth’s Crust cause
heating and squashing of rocks
Rocks are sometimes changed
Limestone
Marble
Shale
Slate
And also
Sandstone
Quartzite
Metamorphic Rocks
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Igneous
Sedimentary
Changed
Great Heat
Pressure
Marble
Quartzite
Schist
Gneiss
Handout: Metamorphic Rock
• Lets break this handout into groups
• Each group take a section. Read through it. Try
to put it into your own words.
• Share your explanations with the class.
Activity: Read all the case study in your groups.
Highlight parts you do not understand.
Each group will reteach the topic again.
Activity
• Using the hand out create a table of
metamorphic rocks.
• Use the following headings
1. Rock Name
2. Type of metamorphic rock
3. Appearance
4. How it was formed
5. Location in Ireland.
The Rock Cycle
• The process by which each rock type can be
changed into another
To remember the rock cycle!
• http://www.youtube.com/watch?v=53lMdHzv
GCQ&playnext=1&list=PLFE564A227272476F
&feature=results_video
Activity: Teach each other the rock cycle in
your groups
Activity
• In your groups draw and label the rock cycle.
**No Cheating!!!** put away the copies!!!
Human Interaction with the Rock
Cycle
• Mind Map Human Interaction with the rock
cycle
Quarrying
• Read page 48 and page 49 as a class.
• In your groups summarise the main points of
each heading
• This is a long question so remember…. Use
your own words!!!