Classifying Rocks
What are the three types of rocks?
Igneous, Metamorphic, Sedimentary.
What is a mineral?
A mineral is a naturally occurring, inorganic solid with a crystal structure.
What is a geode?
A geode is a rounded, hollow rock often lined with mineral crystals.
What is a crystal system?
A crystal system is where crystals grow atom by atom to form a particular structure.
How do sedimentary rocks form?
They form by erosion, deposition, compaction, and cementation.
How do Igneous rocks form?
Igneous rocks form on or beneath the Earth’s surface as magma rises and cools on the surface.
What is a streak?
A streak is the color of the minerals colors powder.
What is a gemstone?
Minerals that occur in nature. They are, hard, colorful, and have a brilliant or glassy luster.
How many categories are there?
What does compaction mean?
Compaction is the process that presses sediment together growing thick layers that build up over millions of years.
What’s the difference between extrusive and intrusive rocks.
Extrusive rocks are igneous rocks that have erupted onto earth’s surface. Intrusive rocks do not erupt from a volcanic eruption.
What is luster?
Luster is how light is reflected from a mineral’s surface.
What is an ore?
An ore is a rock that contains a metal or other valuable minerals that can be mined and sold at a profit.
What shape is the hexagonal structure made of?
It’s made of Hexagonal.
What is erosion?
Erosion is when wind and water scrape away at a rock until tiny bits fall off.
What kind of rock is obsidian?
Igneous
What is 7th on the Mohs hardness scale
Quartz
What is a solution?
A solution is a mixture in which one substance is dissolved in another.
What shape does isometric Crystal system look like?
Isometric.
What are clastic rocks?
Clastics are rocks that are broken into pieces of minerals and rock fragments.
What does a rock need to become a metamorphic rock?
Heat and Pressure
Name the lowest and the highest hardness on the mohs hardness scale.
Talc and Diamonds.
What is crystallization?
The process that occurs when particle dissolved in a liquid solidify in an orderly, repeating pattern and form crystals.
What is a unique property that can be used to classify minerals.
Magnetism or the ability to grow under ultraviolet light.
What are non-foliated rocks?
A rock that has minerals grains that are arranged randomly.