Name                                                   Period:               Date:                                         EN:    

Rocks and Minerals Review Guide

1.      Identify each of these as sedimentary, metamorphic or igneous.  Explain you reasoning.




2.      List the order in which these geologic features formed.

3.      Which diagram represents a landscape where fine-grained igneous bedrock is most likely to be found?

4.      Describe how the rate of cooling effects the texture of a rock.




5.      Describe how igneous rocks are formed.




6.      What kind of rocks are formed as a result of heat and pressure beneath the Earth’s surface?

7.      What kind/s of rock can contain fossils?


8.      What kind/s of rock are made from magma?


9.      Which of the following happen most quickly?

a.      subduction                          b.  folding                                 c.  faulting

10.   Explain the difference between absolute age and relative age in terms of how we determine each and what each tell us about the rock.








11.   What is happening at Valley X that is not happening at Valleys Y or Z?



12.   A rock that originally contained 400 grams of Uranium-235 now contains 25 grams of Uranium-235.  How many half lives have passed since this rock was formed?




13.   Uranium-235 decays through a long but relatively fast series into Lead-206 which is stable.  In the following diagrams, the black dots represent U-235 atoms and the white dots represent Pb-206 atoms.  According the principle of radioisotope dating, which of the following rocks is the youngest? oldest?







14.   A sample of an unknown mineral has a mass of 145g and a volume of 53.7 mL.  What is the density of this mineral?  What mineral is it?


15.   What causes minerals to have different crystal shapes?



16.   Where will you usually find the youngest sedimentary rock in a rock outcropping?



17.   Conglomerate is a fragmental sedimentary rock (it is composed of small rocks cemented together by fine particles).  How might this type of rock form?




18.   Where do intrusive igneous rocks form?  Where do extrusive igneous rocks form?



19.   How might you be able to tell the difference between an intrusive and extrusive igneous rock?



20.   What processes change a sedimentary rock into sediments?



21.   What does it mean to say that a rock is foliated?


22.   Identify three different ways a sedimentary rock can form.










23.   What kind of substance (discussed in this unit) is made of either an element or a compound, but never a mixture?


24.   List at least 4 different characteristics used to identify minerals and briefly explain each.












25.   Which of the following sedimentary rocks is the oldest?  youngest?



26.   In outcrop C, which happened most recently, faulting (at X-Y), an igneous intrusion, contact metamorphism or an unconformity?


27.   What rock type accounts for the vast majority of the rocks shown in these outcroppings?



28.   Why is the volcanic ash layer considered a good time marker for correlating rocks?

29.   What name is applied to coarse grained, mafic rock?



30.   What are the three most common minerals found in andesite?



31.   How does dolostone form?




32.   What clastic rock has the largest grains of sediment?




33.   What sedimentary rock is primarily made from the mineral halite?




34.   What kind of rock sedimentary rock can change into quartzite?




35.   Which foliated metamorphic rock has the largest crystals?



36.   List the labeled rocks in order of decreasing age.




37.   What is the line from A to A’ evidence of?


38.   Did the tilting of layers 5 and 6 happen before or after the intrusion labeled 7?



39.   Use the rock type tables to help you figure out what kind of rock probably formed as a result of contact metamorphosis of layers 5 and 6.