Igneous
What does ignis mean?
fire
What is weathering?
Organic or chemical changes that happen to rocks
ex: hydrolosis, oxidation, carbonization, hydration
What is sediment?
Small pieces of rock (gravel, pebbles, sand, clay)
Plants, fossils.
How do grains in (pumice) form?
From the slow cooling of lava.
Name one glossy igneous rock
obsidian
How does hydration change a rock?
Water travels through the rock, when it freezes it will crack or break open the rock.
What is Compaction?
squeezing, pressing or pressure, that puts rocks together.
How does deposition (deposits) form?
Deposits form when erosion moves sediment and is deposits to different locations.
which igneous rock has air pockets
pumice
How long does the weathering process take?
Years and years.
What is cementation?
the process that glues together sediment.
Where can igneous rocks form?
Intrusive will form inside Earth and extrusive will form outside of Earth (land)
What substance forms igneous rocks?
Magma or lava
What is erosion?
The process that involves the movement/trasport of soil and rock.
What is strata?
layers made from sediment
How are igneous rocks formed?
Cooling and solidifying of magma or lava
Name 3 igneous rocks
pumice, obsidian and granite
How can weathering and erosion happen at the same time?
Locations: near the shore, in rivers and mountains...
Name 3 sedimentary rocks
shale, limestone and conglomerate
How do sedimentary rocks form?
weathering, erosion, deposition, compaction and cementation make strata.