Chapter 5 Flashcards
How are Igneous rocks formed?
Igneous rocks were formed when magma or lava cooled down. Magma cooled down on the surface while lava cooled down on the surface of the earth.
What are the 3 different rock groups?
1) Igneous Rock
2) Sedimentary Rock
3) Metamorphic Rock
How are sedimentary rocks formed?
Sedimentary rocks were formed when existing rocks, plant and animal life were won down and compressed to form new rocks. This mainly happens underwater.
How are metamorphic rocks formed?
Metamorphic rocks are formed when existing rocks are changed by great heat and/or pressure.
Name 2 igneous rocks?
1) Basalt
2) Granite
Name 3 sedimentary rocks?
1) Sandstone
2) Limestone
3) Shale
Name 2 metamorphic rocks?
1) Quartzite
2) Marble
What is the most common rock in Ireland?
Limestone. A sedimentary rock.
What is granite?
Granite is a coarse-grained rock of different colours(white, grey, black. Granite was formed when magma cooled beneath the surface of the earth. Because it cooled slowly large crystals were formed. The large crystals can be clearly seen.
What is granite used for?
Granite is used in buildings and kitchen worktops.
Give examples of granite?
Wicklow Mountains
Mourne Mountains Co. Down
What is limestone?
Limestone was formed from the shells and bones of fish that are laid down in layers at the bottom of the sea. Pressure from these layers formed limestone. The remains of fish bones and shells are preserved as fossils in limestone.
What is limestone used for?
Limestone is used in buildings and in road surfaces and it is also usedin the manufacture of cement.
Give examples of limestone?
The burren Co. Clare
The midlands
True or False
Sedimentary rocks are laid down in layers called strata with vertical joints and horizontal bedding planes.
True
