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Geosphere (Other properties of minerals (Fracture and cleavage (Cleavage:…
Geosphere
Other properties of minerals
Tenacity
Breaks = Brittle If not= tough
Resistance a mineral to being breaking o bending
Fracture and cleavage
How a minerals breaks
Fracture:When minerals breaks into irregular shaped fragments
Cleavage: is when a mineral breaks into regular shaped fragments
For example: gupsum= used for construction
Hardness
Measured with mohs scale
For example: Talc(1) Diamond (10)
Resistance of a mineral
Lustre
Types :
matte
Ava mantine
Pearly
Silky
Glassy
Metallic
How their surface reflects light
The lawyers
Mantle
Most common rock: Periodite
Solid and soft
Occupes interior of earth
Core
Hottest part
Two parts
outer core: solid
inner core: liquid
Made of iron and rickel
Crust
Earth's Surface
Two types
Continental crust
Oceanic crust
Thinnest layer
Common rocks: granite, basalt, slate.
Physical properties of minerals
Crystalline
Can see with naked eye
For example:
quartz----------------- Prismatic
pyrite------------cubic
Particular geometric shape
Colour and strak
For example
sulphur---------- yellow
pyrite----- cubic
Most minerals come in several (different colour)
Some minerals characteristic colour
For example: Quartz
Igneous Rocks
Two types
Volcanic rocks
Sometimes trap their bubbles
Formed when lava solidifies
Glassy Appearance
For examples:
Basalt
Pumice
Obsidian
Plutonic rocks
Formed when magma solidifies
Often have crystals(easy to see)
For example:
Granite
Most abundant rock ( on land)
Periodite
Mos abundant rock( in mantle)