Lesson Worksheet: Classification of Igneous Rocks Geology
In this worksheet, we will practice classifying and describing igneous rocks according to their depth of crystallization, mineralogy, and texture.
Q1:
Which of the following rocks can be described as volcanic?
- APeridotite
- BDiorite
- CGranite
- DGabbro
- ERhyolite
Q2:
What word best describes the mineralogy of rhyolite and granite?
- AUltramafic
- BIntermediate
- CFelsic
- DSupermafic
- EMafic
Q3:
True or False: Igneous rocks can be classified by both texture and mineralogy.
- ATrue
- BFalse
Q4:
True or False: Crystals of igneous rocks that form at Earth’s surface are large.
- ATrue
- BFalse
Q5:
Which of the following rocks can be described as plutonic?
- AObsidian
- BRhyolite
- CAndesite
- DBasalt
- EGabbro
Q6:
True or False: The chemical composition of the parent magma controls the mineralogy of igneous rocks.
- ATrue
- BFalse
Q7:
Which of the following igneous rocks can be classified as both extrusive and felsic?
- ARhyolite
- BGranite
- CDiorite
- DBasalt
Q8:
Which of the following igneous rocks can be classified as both plutonic and ultramafic?
- APeridotite
- BBasalt
- CGabbro
- DDiorite
Q9:
Which of the following igneous rocks can be described as fine grained?
- ADiorite
- BGabbro
- CBasalt
- DPeridotite
- EGranite
Q10:
What type of igneous rock are diorite and andesite examples of?
- AFelsic
- BUltramafic
- CIntermediate
- DSupermafic
- EMafic
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