Regents Review #3 Earth Science

Which rock feature is the best indication that a rock has an igneous origin?

• rounded grains of sediment

• vesicular gas pockets

• composition of more than one mineral

• fossils

Which mineral is usually found in granite, but is not found in basalt?

• potassium feldspar

• plagioclase feldspar

• amphibole

• olivine

Which of these rocks has a mineral composition similar to gabbro?

• obsidian

• basaltic glass

• rhyolite

• dunite

When studying igneous rocks, determining their rate of cooling is best done by looking at their

• mineral composition

• texture

• color

• density

How are the rocks conglomerate and breccia different?

• mineral composition

• shape of their fragments

• density

• grain size

Which sedimentary rock is formed when seawater evaporates?

• rock gypsum

• shale

• conglomerate

• breccia

Which rock is composed of quartz, feldspar, and clay minerals that are approximately 0.001 cm in diameter?

• siltstone

• breccia

• shale

• sandstone

Which sedimentary rock forms from the remains of living organisms?

• limestone

• rock salt

• sandstone

• conglomerate

Which of these minerals can scratch all the others?

• galena

• pyroxene

• hematite

• garnet

Which two elements are most common in rocks found near Earth's surface?

• oxygen and carbon

• oxygen and hydrogen

• oxygen and iron

• oxygen and silicon