While there are many hundreds of different minerals, the overwhelming majority of Earth's crust is composed of just eight common rock-forming minerals.Group startsTrue or False

Name the three rock forming minerals.

Elements in Earth's Crust and Their OriginsElement Volcanic Activity Mantle Degassing Metamorphic/Weathering Processes Extraterrestrial Sourcesoxygen48%25%22%10%silicon6%28%46%0%aluminum12%7%66%15%Earth’s crust is composed of many elements, some of which originate primarily from four sources: primordial volcanic activity, mantle degassing, metamorphic and other weathering processes, and finally extraterrestrial sources such as meteorites. Geologist Celeste Ramirez led a team that calculated average rates of composition of elements in the crust (such as oxygen and silicon) showed that older sources, such as volcanic activity or mantle degassing, are responsible for higher rates of nonmetals (nitrogen, oxygen, phosphorus, etc.) in the Earth’s crust than metals (aluminum, gallium, tin, etc.), which are deposited by more relatively recent processes such as weathering and meteorite impacts. For example, whereas 48% of the oxygen found in Earth's crust is a result of volcanic activity -------Which choice most effectively uses the data from the table to complete the example?25% of the oxygen in Earth's core comes from mantle degassing.eliminate66% of the aluminum in Earth's core comes from weathering processes.eliminate0% of the silicon found in Earth's core comes from extraterrestrial sources. eliminate22% of the oxygen in Earth's core comes from extraterrestrial sources.

About 80 percent of the magma reaching Earth's surface is basaltic, with only about 10 percent andesitic and 10 percent rhyolitic.Group startsTrue or False

1. After quartz, calcite is the ..... in the crust of the Earth. Mineral is most abundant Mineral that most abundant Most abundant mineral that Most abundant mineral

Continental crust is primarily composed of:Group of answer choicesBasaltPartly basalt, partly graniteClay and sandGranite