Heat and pressure applied to pre-existing rocks form metamorphic rocks.
100
What are the two ways sedimentary rocks form?
Sedimentary rocks form from compaction and cementation or sediments.
100
What is the process of rocks turning from one rock to another called?
The process of one rock turning into another is called the rock cycle.
200
Are rocks formed naturally?
Yes, rocks form naturally in nature.
200
What are the two classifications of igneous rocks?
Igneous rocks can be classified by intrusive or extrusive characteristics.
200
Name one characteristic of a metamorphic rock.
Banding is a characteristic of a metamorphic rock.
200
What are the two classifications used to identify sedimentary rocks?
The two classifications are clastic and non-clastic or organic.
200
How would an igneous rock turn into a metamorphic rock?
The igenous rocks turn into metamorphic rocks by being subjected to heat and pressure.
300
Can rocks change from one form to another?
Yes, rocks can change from one form to another. This is called the rock cycle.
300
When an igneous rock cools extremley fast, what form of texture will be created?
The texture of an extremley fast cooling igneous rock is glassy.
300
What are the two ways geologists classify metamorphic rocks?
Geologists classify metamorphic rocks by foliated or non-foliated structure.
300
What makes a bioclastic rock different from a clastic rock?
Bioclastic rocks are made from once living creatures, while clastic rocks are made from rock fragments and sediments.
300
How do igneous rocks turn into sedimentary rocks?
Igneous rocks must weather, erode, get deposited, go through compaction and cementation before becoming a sedimentary rock.
400
What is one difference between sedimentary and metamorphic rocks?
Sedimentary rocks can have fossils, while metamorphic rocks cannot.
400
As the time a rock cools increases, what happens to the crystal size?
The longer the igneous rock takes to cool, the larger the crystals will be.
400
Which metamorphic rock shows banding and has a medium to coarse crystal structure?
What is gneiss.
400
Why can sedimentary rocks have fossils, while metamorphic or igneous rocks cannot?
Igneous rocks cannot have fossils because the fossils would have been melted away. Metamorphic rocks cannot have fossils because the fossils would be ruined in the heat and pressure found under the surface of the Earth.
400
How does a metamorphic rock turn into an igneous rock?
The metamorphic rock must melt before turning into an igneous rock.
500
How do igneous and metamorphic rocks differ?
Igneous rocks are formed from cooled lava or magma, while metamorphic rocks form from pre-existing rocks that were subjected to heat and pressure.
500
What are the air pockets called that form when an igneous rock cools quickly?
The air pockets are called vesicles; showing vesicular air pockets.
500
Which metamorphic rock has quartz in it?
What is quartzite.
500
What sedimentary rock is considered clastic and has rounded fragments?
What is conglomerate.
500
Can a sedimentary rock turn into another sedimentary rock? If so how? If not, why not?
Yes, a sedimentary rock can turn into another sedimentary rock by the weathering, eroding, depositing, compaction and cementation of sediments.