1. A) white quartz B) aluminumC) pink feldspar D) iron1. Compared to felsic igneous rocks, mafic igneous rockscontain greater amounts ofA) monomineralic igneous rockB) polymineralic igneous rockC) monomineralic sedimentary rockD) polymineralic sedimentary rock2. Rhyolite is an example of aA) intrusive igneous B) extrusive igneousC) metamorphic D) sedimentary3. Which type of rock is likely to show ripple marks andfossils?4. Base your answer to the following question on the rocksample shown below.A) granite, an igneous rockB) conglomerate, a sedimentary rockC) siltstone, a sedimentary rockD) Weiss, a metamorphic rockThe rounded pebbles of this rock have been cementedtogether to formA) melting and solidificationB) heat and pressureC) erosion and depositionD) compaction and cementation5. Most igneous rocks form by which processes?A) mineral composition of the magmaB) cooling rate of the magmaC) fossil content of the rockD) color of the rock6. Large crystals in an igneous rock most likely form as aresult of theA) high in density and dark in colorB) high in density and light in colorC) low in density and dark in colorD) low in density and light in color7. A mafic igneous rock is most likely to be relativelyA) felsic, with low densityB) felsic, with high densityC) mafic, with low densityD) mafic, with high density8. Olivine and pyroxene are commonly found in igneousrocks that areA) intergrown crystals B) fossilsC) minerals D) sediments9. Igneous, sedimentary, and metamorphic rocks areusually composed ofA) weathering and erosionB) great heat and pressure that did not producemeltingC) rapid cooling of molten materialD) burial and cementation of sediment10. A fine-grained igneous rock was probably formed byA) age B) originC) size D) hardness11. The grouping of rocks as igneous, sedimentary, andmetamorphic is based primarily upon differences in
2. 12. Base your answer to the following question on the block diagram below, which shows a portion of Eathscrust. Letters A, B, C, and D indicate sedimentary layers.A) granite B) pegmatite C) gabbro D) pumiceThe igneous rock is mostly composed of potassium feldspar and quartz crystals that have an average grainsize of 3 millimeters. The igneous rock is most likelyA) gabbro B) basaltC) granite D) rhyolite13. Which is a fine-grained igneous rock made up primarilyof pyroxene and plagioclase feldspar?A) index fossilsB) faults in the rockC) the crystal size of its mineralsD) the disintegration of radioactive substances14. The best evidence for determining the cooling rate of anigneous rock during its solidification is provided byA) olivine and quartzB) olivine and pyroxeneC) pyroxene and orthoclaseD) orthoclase and quartz15. Which minerals are found in the igneous rocks gabbroand basalt?16. Base your answer to the following question on thediagrams below of five rock samples.A) sandstone B) conglomerateC) basalt D) graniteWhich sample is igneous and has a coarse texture?A) rhyolite and dioriteB) pumice and scoriaC) peridotite and andesiteD) gabbro and basalt17. Which two igneous rocks could have the same mineralcomposition?A) a high-grade metamorphic rock layer made frommixed igneous and sedimentary layersB) a series of alternating layers of shale andsandstoneC) a basalt lava flow from an ancient volcanoD) a mass of granite in the core of a mountain18. Which kind of bedrock would most likely containfossils?
3. A) sedimentary rockB) metamorphic rockC) fine-grained igneous rockD) coarse-grained igneous rock19. The chemical precipitation of dissolved minerals fromocean water results in the formation of20. Base your answer to the following question on Whichtype of rock is represented by the map symbol below?A) clastic sedimentary rock formed from organicsubstancesB) chemically formed sedimentary rock that consistsmainly of the mineral calciteC) regional metamorphic rock with block likefoliationD) contact metamorphic rock that results from thealteration of limestone by contact with an igneousintrusion21. The diagram below represents the fossils found in abedrock formation located in central Rhode Island.A) sedimentary rock that formed in an oceanenvironmentB) sedimentary rock that formed in a landenvironmentC) igneous rock that formed in an ocean environmentD) igneous rock that formed in a land environmentIn which type of rock were the fossils most likelyfound?
4. 22. Base your answer to the following question on the map and cross section below. The shaded areas on themap represent regions of the United States that have evaporite rock layers (layers of rock formed from theevaporation of seawater) under the surface bedrock. The cross section shows the generalized structure ofthe area in which the evaporite layers are found in New York State.A) sedimentary B) plutonic igneousC) regional metamorphic D) contact metamorphicThe surface rocks overlying these evaporite rock layers are most likely which type of rock?A) land-derived sedimentary rockB) chemically formed sedimentary rockC) foliated metamorphic rockD) nonfoliated metamorphic rock23. Dolostone is classified as which type of rock?A) sedimentary rocks of Devonian ageB) sedimentary rocks of Ordovician ageC) igneous rocks of Cambrian ageD) intensely metamorphosed rocks of MiddleProterozoic age24. The surface bedrock of the Tug Hill Plateau iscomposed primarily ofA) Many metamorphic rocks contain only onemineral.B) Many metamorphic rocks have an organiccomposition.C) Many metamorphic rocks exhibit banding anddistortion of structure.D) Many metamorphic rocks contain a high amountof oxygen-silicon tetrahedra.25. What is the main difference between metamorphicrocks and most other rocks?A) metamorphic rock B) sedimentary rockC) igneous rock D) volcanic rock26. The recrystallization of unmelted material under hightemperature and pressure results in27. The diagram below represents a sample of a rock.A) distorted bandingB) an organic compositionC) a mixture of mineralsD) crystals from precipitationThis rock would be classified as metamorphic because itshowsA) erosion of rocksB) recrystallization of rocksC) cooling and solidification of molten magmaD) compression and cementation of soil particles28. Metamorphic rocks result from the
5. A) precipitation from evaporating waterB) melting and solidification in magmaC) erosion and deposition of soil particlesD) heat and pressure causing changes in existing rock29. Metamorphic rocks form as the direct result ofA) sediments are cemented and compactedB) magma cools slowly, deep undergroundC) flows of lava cool rapidlyD) rocks are subjected to heat and pressure30. Most metamorphic rocks are formed when