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

Which crust is composed of dense basaltic rocks, and is compact with an average thickness of 10 kilometers?Group of answer choicesBoth Oceanic and Continental crust.Oceanic crustContinental crustNone of these choices.Next

Which of these statements is TRUE about continental crust?It is only 200 million years oldIt is not very denseIt is composed of basaltIt can be destroyed by sinking into magma

The dominant element in the Earth’s crust is:Group of answer choicesSilicaOxygenIronPotassiumSilicon

Rocks that form when magma solidifies are _____ rocksGroup of answer choicescrystallinemetamorphicigneousmagmatic

Which of the following elements is the most abundant in Earth's crust?Group of answer choicesCarbonIronOxygenSilicon