In the blank space, write the letter that best answers the question: Which speci

Question

In the blank space, write the letter that best answers the question: Which specific layer of the planet's interior is the source of Earth's magnetic field? a) inner core b) outer core c) mantle d) aesthenosphere c) crust Scientists have found evidence that the outer part of the planet is divided into large "interacting pieces called lithosphere plates. Which layers of the planet compose the lithosphere? Write your letter choice in the blank space provided. a. crust and aesthenosphere b. crust and solid uppermost mantle c. crust and Moho. d. continental crust and oceanic crust Igneous rocks are rocks that solidify from magma as it cools. Granite is the common igneous rock of continents. What does the crystal size of the minerals within granite indicate about the circumstances under which granite cooled? Write your letter choice in the blank space provided. a. Tiny microscopic crystals indicate that granite cooled quickly at the surface. b. Large crystals indicate that granite cooled quickly at the surface c. Tiny, microscopic crystals indicate that granite cooled slowly below the surface.. d. Large crystals indicate that granite cooled slowly beneath the surface Limestone is a type of sedimentary rock that readily dissolves in weak acid. How does limestone typically form and what is its chemical composition?

Explanation / Answer

Answer : 2) b

Outer core is the region where the earth's magnetic field is originated

Outer core is essentially made-up of iron and is in liquid state, convection currents or the flow of liquid in the outer core generates electrical currents and hence the magnetic field.

3) c

the crust and upper part of mantle together is called as lithosphere. there are 7 major lithospheric plates and several minor plates

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