Rock Types
Three main types of rocks.
What are sedimentary, metamorphic, and igneous rocks?
This is the color of the powder left behind when the mineral is scraped across a surface.
What is a mineral streak?
This formed 4.6 billion years ago and is the 3rd planet from the sun.
What is Earth?
Hardness, color, density, and cleavage is how you identify this.
What is a mineral?
The layer right below the Earth' crust.
What is the mantle?
This rock is formed when magma cools below the surface.
What is an intrusive igneous rocks?
This rock type name comes from the Latin word ignis.
What is an igneous rock?
This is the earliest era in Earth's history.
What is the Precambrian era?
This is formed in nature, has a definite chemical makeup, is a solid, and has a crystal like structure.
What is a mineral?
This is the hardest mineral on the Mohs hardness scale.
What is a diamond?
This type of rock has air pockets that form in rapidly cooling magma or lava.
What is an igneous rock?
This is breakdown of large rocks into smaller sediments.
What is weathering?
This is the era we are currently living in.
What is the Cenozoic era?
The two characteristics that rocks and minerals have.
What are formed in nature and and is a solid?
These are the two major types of luster.
What are metallic and nonmetallic?
Fossils are found mostly in this type of rock.
What is a sedimentary rock?
In a sedimentary rock, these are the distinct layers of sediments.
What is strata?
This era includes the Cretaceous period, the Jurassic period, and the Triassic period.
What is the Mesozoic Era?
This is the second most common group of rock-forming minerals.
What are carbonates?
This is a carbonate mineral.
What is calcite?
This rock type is foliated.
What is a metamorphic rock?
This is the origin of the word "luster".
What is Latin?
Bright Angel Shale deposited during this period.
What is the Ordovician period?
This is the color of feldspar's streak.
What is white?
This makes up about 90% of the rocks in earth's crust, and is the most common rock-forming minerals.
What are silicates?