Rocks and Minerals 1
the word that describes minerals that means it has never been alive.
inorganic
a common igneous rock that is black and very glossy
obsidian/volcanic glass
sedimentary rocks are made of layers of _______________
sediment
metamorhpic rocks are made by __________ and ___________
heat and pressure
Non-silicates are what group of minerals?
Common rock forming minerals
What are the ways to test a mineral?
Name 4
color, hardness, luster, streak test, cleavage/fracture, density
the two ways to describe where an igneous rock was formed
intrusive or extrusive
the laying down of sediments is called?
Deposition
Metamorphic rocks can be made from what other type of rock?
Any type of rock can be made into metamorphic rock
What is fluorescence?
The ability of a mineral to glow under ultraviolet light.
What is a common item with a hardness of 2.5 on Moh's Hardness Scale?
Fingernail
how igneous rocks are made
Cooling and crystallization of molten rock
Name three special properties of minerals.
Magnetic, Fluorescence, texture, Acid reaction, Odor
Hematite has different color but the streak color is always blue.
(T/F) and reason
F - it is always reddish brown
What is Vein?
When minerals crystallize in the cracks of the rock.
This is one way to identify minerals. It looks at the way a mineral breaks.
Cleavage and Fracture
What are the two types of crystal arrangement in Intrusive Igneous Rock?
Interlocked Crystals and Random arrangement of crystals
Name two differences between Sedimentary and Igneous Rocks
Found in river banks, mountain valleys, and beaches.
Made by weathering, erosion, deposition, compaction and cementation.
Igneous: Made my molten rocks
Found in subduction zone and mid-ocean ridges
Made by cooling and crystallization
How are Clastic Sedimentary Rocks classified?
by the size and shape of clasts
a metamorphic rock can become a sedimentary rock by _____________________
weathering, erosion, deposition, compaction and cementation
Definition of definite chemical composition
It is the arrangement, type, and ratio of elements in the mineral
What is the second step in mineral forming in hot solution?
The water flows/seeps into the deep and hot area under the earth's surface.
How does a minerals crystallize in cool solution?
Rain water and melted ice water break rocks and minerals.
The water flows over and seeps into the ground. While it flows over the ground it picks up and dissolves minerals
The water leaves the solution in the process of evaporation and minerals crystallize.
Name two differences between Mineral and Rock
1 Mineral are unit of rocks
1 Rocks are mixture of minerals
2. Minerals are always inorganic
2. Rocks can be organic
Rocks are a solid mixture of various elements in nature.
(T/F)- Reason also!
F- Solid mixture of MINERALS not ELEMENTS