Igneous
From other rocks melting into magma, which then cools and solidifies into igneous rock
How is a sedimentary rock created
Sedimentary rock is created by wind and rain first creating sediment, which is then compacted and cemented into sedimentary rock
What type of plate boundary has plates uplifting and subducting above/below each other?
Convergent
What is the difference between weathering and erosion
Weathering = rocks breaking into smaller pieces
Erosion = the small pieces being moved somewhere
This teacher received 10 days of ISS in 7th grade for starting a food fight.
Mr. Wehrle
Can energy from the sun (wind and rain) create an igneous rock?
No. Igneous rocks are created by energy from the Earth's interior (melting into magma)
Sedimentary rock is created at the surface. How can it be moved underground?
By a subducting plate
Intense heat and pressure from two converging plates can create Metamorphic rocks. Where do these rocks occur?
Aside from wind and rain, how else can large boulders be transported to a new location?
Glacial Activity
When they were a student, this teacher made their teacher cry and leave class.
Mrs. Mendoza
A student finds a sedimentary rock in their yard and wonders if this could have once been an igneous rock. Could it have been?
Yes. If an igneous rock is exposed to weathering and erosion on the surface, it can turn into sediment, this sediment can be compacted and cemented into a sedimentary rock.
A student finds an igneous rock at the park and wonders if it could have once been sedimentary. How could an igneous rock have once been sedimentary?
Yes. If the original sedimentary rock is transported into the mantle by subduction, the sedimentary rock will melt into magma which cools to form an igneous rock
A plate is subducting into the mantle, and forms a trench at the boundary with the other plate. Below this plate boundary, can sedimentary rocks be formed?
No. Sedimentary rocks are only formed at the surface. At and below the boundary, metamorphic or igneous rocks are created.
A student is writing a report on the rock cycle They state that after a mountain is weathered, and the sediment moves to a new location, it then melts on the surface and turns into metamorphic rocks. What is wrong with this statement?
Sediment deposition does not lead to melting.
Melting does not result in metamorphic rocks
This teacher was riding their bike home in 3rd grade, and got into trouble for tampering with federal property.
Mr. Rickbeil
A blob of magma cools underground, forming an igneous rock below the surface. How could this new igneous rock be eventually moved to the surface?
By uplift. If the igneous rock is part of an uplifting plate on a convergent boundary, it can be moved higher and higher over time until it reaches the surface.
Or, the rocks on top of it can be eroded away.
Why do sedimentary rocks weather and erode away faster than igneous and metamorphic rocks?
Because they are by nature pieces of smaller rocks pressed together, these smaller rocks can be weathered away easier than igneous and metamorphic, which are basically one cohesive unit of rock
Africa is slowly being subducted underneath Europe on their tectonic plates. What kind of landform would we expect to see at the plate boundary in the Mediterranean Sea?
An Oceanic Trench
A student is writing a geology report. They say that metamorphic rocks underground can weather into pieces and those pieces are then compacted and cemented into sedimentary rock. What is wrong with this?
Weathering happens on the surface. The metamorphic rock must first be exposed to the surface before becoming a sedimentary rock.
This teacher had to move seats so many times during a school year for nonstop talking with friends, that they had to spend the year sitting next to the teacher
Mrs. Higdon
A beach on Hawaii has lots of green sand. This sediment originally came from igneous rocks. Why is the sand green?
The original igneous rocks had lots of green material in it (minerals). When it was weathered and eroded, this green sediment accumulated on the beach.
A student finds a sedimentary rock on a hillside. This rock appears to have many layers and stripes inside of it. How is this layering created?
Layers of sediment are deposited one on top of the other. These can sometimes be cemented together into visible layering. Wind, tides, and waves can contribute to this layering pattern.
A region of metamorphic rock is uplifted at a convergent boundary, but does not reach the surface (it is still underground). How can this layer of metamorphic rock be exposed to energy from the sun?
If the layers above it are weathered and eroded away (sun energy), the metamorphic rock below is now exposed at the surface.
Explain how Devils Tower formed into the shape we see today
Devils Tower was a magma body that cooled underground to form igneous rock, which was surrounded by sedimentary layers. After the sedimentary layers eroded away, the tower was the only thing left.
This teacher got in trouble at school for beating up a boy who made fun of their sister.
Mrs. Peterson