Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Rocks

No description
by

Miss Cummins

on 19 October 2015

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Rocks

Three types of rock
Sedimentary Rocks
Limestone, Sandstone and **Shale
Igneous Rocks
Basalt and Granite
Rocks
Earths crust = rocks

Rocks = minerals

Held together by natural cement

They differ in many ways

Metamorphic Rocks
Marble and Quartzite
They differ in the following ways:
Hardness
Texture
Colour
Mineral content
Igneous
Sedimentary
Metamorphic
Igneous
Formed as a result of volcanic activity

Hot molten magma escapes from the
mantle

Cools
and
solidifies
quickly into earth's surface or slowly inside the crust
Basalt
Granite
Sedimentary
Formed from the particles of rocks and dead plants and animals (fossils)
Deposited on the sea/lake beds and land
Layers build up
Compressed and cemeted creating solid rock
Limestone
Sandstone
Metamorphic
Formed from rocks that already exsist
Form when igneous or sedimentary rocks are changed into new rocks
These changes are caused by heat or pressure or both
Marble
Quartzite
Three rock types

Write out summary for each into hardbacks

Write down the
name, how they were formed and give two examples

Page 83
Grey/black rock with medium grained texture

Formed when lava spread out over surface of earths crust

It then cools and hardens
Basalt
Basalt is full of
tiny crystals
- microscope

This is becasue the lava cools and hardens very quickly in the open air when it reaches the surface

Basalt is found in the Antrim-Derry Plateau in the NE of Ireland

Use -
Road chippings
Example: The Giant's Causeway
Granite
Range in colour from black to pink and cream

Course grained

Formed when molten magma pushes its way into the crust - then cools and hardens

Cooled very slowly over millions of years =
large crystals

Crystals include minerals such as quartz, feldspar and mica

Eventually exposed when rock is worn away

Use -
worktops, fire places and construction
Example: Wicklow Mountains and Mourne Mountains
Limestone
Grey rock

Easily weathered

Formed at the bottom of warm shallow seas

Made from particles of shells and fossils
Shells and fossils
pile up on sea floor
over millions of years

Weight compressed and cemeted the particles =
layers
of solid rock

Permeable
= water can pass through it
Soluble
= dissolves in water

Most common Irish rock
Uses
- Monuments, construction and soil fertility when grounded into lime
Example: Burren, Co. Clare
Sandstone
Reddish colour

Course grained

Formed with sand that was worn away from the Earth's crust

Carried by wind/rivers deposited in seas/lakes/deserts

Layers build up
over time

Layers compressed and cemented

Uses
- patios and construction
Example: MacGillycuddy's Reeks, Co. Kerry
Marble
Limestone
is put under great heat/pressure - changes into marble
Very very
hard
rock
Varies
in colour
Can be cut and
polished
Found
in:
- Antrim (white)
- Cork (red)
- Connemara (green)
- Kilkenny (black)

Uses
: monuments, floor tiles, fireplaces, gravestones and ornaments
Quartzite
White/grey
rock

Extremely
hard

Formed from
Sandstone
- changed by great heat/pressure
Found in many of Irelands mountains
Croagh Patrick
in Mayo
The
Sugarloaf
in Wicklow


Uses
: watches, road chippings, sandpaper and glass
The Rock Cycle
Full transcript