This rock, ____________, is very resistant to weathering. As a building material, its durability and attractive salmon color (due to the presence of K-feldspar) makes it popular for countertops and tombstones. Group of answer choicesobsidiangranitebasaltpumice

Which rock layer appears to resist weathering? Meaning it is a strong rock.2134

Which mineral is acid, felsic, and most resistant to weathering (HINT: think Bowen's reaction series)?Group of answer choicesquartzmuscovitebiotiteolivine

Match the type of rock with how it forms.MetamorphicIgneousSedimentary?Forms due to cooling?Can form from decaying animals?Can only form undergroundSUBMITarrow_backPREVIOUS

This rock, _______________, is made of  "welded" volcanic ash (it is very hot when it settles). It is commonly used to make cosmetic exfoliants. It works well as an abrasive because volcanic ash is made up of tiny shards of glass.Group of answer choicesobsidiangranitebasaltpumice

When shale is buried to depths where temperatures are about 400*C, it metamorphoses into __________. This rock splits into thin sheets like shale does, but not nearly as easily. Although it is laminated, it is very strong, which makes it useful for roof and floor tiles.Group of answer choicesmarblegneissslateschist