Transcript 1A2 Geography March 10th

1A2 GEOGRAPHY
MARCH 10TH
Objectives:
•
•
Students will review the ways in which igneous
and sedimentary rocks are made.
Students will learn about the formation of
metamorphic rock – marble & quartzite.
HOMEWORK:
Last night’s homework.
 Let’s look over questions 2 & 3!

HOMEWORK FOR MONDAY’S CLASS

Over the coming week, take note of places around
the town where you find examples of the uses of
marble.
REVIEW!
Over the past week, we have been learning about
the ways in which different kinds of rock are
formed.
 Now we’ll review what we’ve done so far!
 Activity.

METAMORPHIC ROCK
Made from rocks that already exist.
 When igneous and sedimentary rocks are exposed
to great heat and pressure, they can be
changed into new, harder rocks.
 Rocks
formed in this way are called
metamorphic rocks.
 Examples include marble and quartzite.

MARBLE
This is formed when limestone is put under
great heat and pressure.
 Marble varies in colour, depending on the
location in which it was formed:
 Co. Cork.
 Connemara, Co. Galway.
 Co. Kilkenny.
 Co. Antrim (white!)

MARBLE
Marble can be cut, polished and used for many
things:
1. Fireplaces.
2. Floor tiles.
3. Monuments.
4. Ornaments.
5. Headstones on graves.
 It is a very hard rock.

QUARTZITE
This is formed when sandstone is exposed to
great heat and pressure.
 It is extremely hard.
 Found on:
1. Croagh Patrick, Co Mayo.
2. Sugarloaf, Co. Wicklow.
 Used in many objects:
1. Road chippings.
2. Sand paper.
3. Glass.
4. Watches.

1A2 GEOGRAPHY
MARCH 10TH
Objectives:
•
•
Students will review
metamorphic rocks.
the
formation
of
Students will learn about some of the uses of
rock.
HOMEWORK
Don’t forget!
 For Monday’s class, you must take note of places
around the town where you find examples of the
uses of marble.

REVIEW OF THIS MORNING’S CLASS
Metamorphic rocks are formed when…
 Marble is formed when…
 Quartzite is formed when…

USES OF ROCK
When we studied Primary Economic Activities,
we learned that, when we exploit a resource, we
are using it to provide for our own needs.
 How to people exploit the rocks that are available
to us?

USES OF ROCK
Rocks have many uses.
 We know that rock is an important building
material.
 Did you know rocks can also be a source of
energy?

USES OF ROCK: ENERGY
The term ‘fossil fuel’ refers to coal, oil and gas.
 These fossil fuels are extracted from the crust in
different ways.

COAL
Methods
used
to
extract coal differ
according to the depth
at which it is found.
 Coal is taken from
open
pits
or
underground mines.

COAL
Uses of Rock
Shaft mining is a way
of taking coal from
deep within the crust.
 Vertical
wells are
drilled first.
 Then,
corridors are
dug out on various
levels so coal can be
extracted.

Shaft mining
OIL AND GAS
Extracted from the
crust
through
a
process of drilling and
pumping.
 This can be done on
land and at sea.
 Offshore, rigs are used
to pump oil and gas to
the surface. It is then
brought ashore.
 Example: Kinsale, Co.
Cork.

BUILDING MATERIALS
Rocks are also taken from deep in the crust for
use in construction.
 Quarrying: Large machines are used to cut rock
out.
 Dynamite: Used to explode rock from the crust.
 Limestone, sandstone and marble are examples
of rocks extracted from the crust for use in
construction.

A DAY IN THE LIFE OFFSHORE

https://www.youtube.com/watch?v=SSicB_xydwA