The Restless Earth Part 1(19 March Assessment) Flashcards
What are igneous rocks?
They are formed when magma/lava cools and solidifies
Describe Granite
Rough Texture
Speckled color
pink/grey
Characteristics of Granite
Intrusive
cools slowly
large crystals
Describe Basalt
Very Hard
Dark grey
Rough and heavy
Small Glittery sparkles may be visible
Characteristics of Basalt
Extrusive
Cools quickly
small crystals
Explain Sedimentary Rocks
Are formed when loose sediment is put under extreme pressure and cements together
What does Sand form?
Sandstone
What does shells/bone form
Limestone
What are Metamorphic Rocks
Formed when rocks are altered due to heat and pressure
What does limestone form when altered
Marble
Describe Sanstones
Grains of sand
no crystal
rough
Describe Limestone
White/Yellow
Hard
Fossils
Describe Marble
Pure white
Describe slate
Dark grey
Smooth Flat
Examples of Constructive Plate Margin
Mid Atlantic ridge( A chain of undersea volcanoes)
Why do we get volcanoes at Constructive Plate Margin
Plates move away from each other
Magma moves up the gap between plates
Why do we get Earthquakes at Constructive Plate Margin
As magma moves up it will break or split rocks
Do we get volcanoes at constructive plate margin?
Yes
Do we get earthquakes at constructive plate margin?
Yes
What landform are formed during destructive plate margin?
Ocean trench
Fold mountains
Examples of Destructive Plate Margin
Peru Chile Trench
Do we get volcanoes in Destructive Plate Margin
Yes
Why do we get volcanoes at destructive plate margin?
Oceanic plate subducts and melts. magma is less dense and rises up
Do we get Earthquakes at destructive plate margin?
Yes