Vocab
The tendency of a mineral to break into irregular pieces.
What is Fracture?
Rocks become this when they are eroded.
What is Sediment/Sand?
The longest Era on the time line.
What is the Precambrian Era?
Forms from molten rock cooling and hardening.
What are Igneous Rocks?
Sand builds up on the bottom of the lake and forms layers of Sandstone.
How is Sandstone formed?
The tendency of a mineral to break into flat pieces.
What is Cleavage?
Impressions of organisms that lived in the remote past.
What are Fossils?
The Era in which the earth formed in.
What is Precambrian Era?
Forms due to heat and pressure.
What are Metamorphic Rocks?
A cementing agent.
What is Matrix?
The way in which light reflects from a minerals surface.
What is Luster?
A plant or animal dies in a watery environment and is buried in mud or silt.
How are fossils formed?
Shortest Era on the timeline.
What is Cenozoic Era?
Forms due to erosion of rocks and layering of sand and sediments.
What are Sedimentary Rocks?
1-weathering and erosion 2-transportation 3-deposition 4-compaction and cementation 5-metamorphism 6-rock melting
What is the Rock Cycle?
Color of the powder left behind when minerals are scraped across a surface.
What is Streak?
The type of rock most likely to have fossils in them.
What are Sedimentary Rocks?
The period in which the dinosaurs appeared.
What is Triassic period?
Forms above and below earths surface and also forms from molten cooling and hardening.
What are Igneous Rocks?
Metamorphic rocks go underground and melt in magma, and when the volcano erupts the magma flows out of it, it cools and hardens to become a igneous rock.
The minerals resistance to being scratched.
What is Hardness?
Sand that is lightly colored and very fine.
What is Dune Sand?
The Era in which The Great Extinction happened.
What is Paleozoic Era?
Comes from the Latin word Ingis which means fire.
What is Igneous Rocks?
These are found in Sedimentary rocks.
What are fossils?