The crust’s role in _______ allows it to provide the raw materials necessary for life on earth.a.the rock cycleb.biogeochemical cyclesc.fossil fuel discoveryd.the water cycle
The Mohorovicic discontinuity was discovered by monitoring the speed of seismic waves through Earth.
Crust and lithosphere refer to the same layer of the Earth.
Ocean ridges form as a result of _______.a.slab pullb.the upwelling of magma from the asthenospherec.sediment being deposited from the oceand.all of the above
Which of the following is true concerning continental crust?a.It does not contain radioactive elements.b.It mostly contains heavier and denser minerals than the mantle.c.It efficiently transfers heat from the mantle to the surface.d.None of the above
Earth’s crust sits on top of the mantle.
Which of the following best explains the importance of Earth’s crust to living organisms?a.The continental crust allowed the evolution of life on land.b.The crust provides raw materials necessary for life.c.The crust allowed the formation of fossil fuels.d.The rock cycle recycles sedimentary rocks formed from animal shells.
Where is oceanic crust thickest?a.at mid-ocean ridgesb.in the center of ocean plainsc.at deep-sea trenchesd.none of the above
The Mohorovicic discontinuity is the _______.a.division between the lithosphere and asthenosphereb.boundary between solid and molten rockc.transition from granitic to basaltic crustd.boundary where crust gives way to mantle
Which layers of the Earth are common to both the compositional and mechanical descriptions? a.crust and mantleb.lithosphere and mesospherec.inner and outer cored.crust and lithosphere
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