Question

Internal structure of earth notes for class 9 icse

Answer 1

The Earth consists of four concentric layers: inner core, outer core, mantle and crust. The crust is made up of tectonic plates, which are in constant motion. Earthquakes and volcanoes are most likely to occur at plate boundaries.
The interior structure of the Earth is layered in spherical shells. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core.Inside the Earth. The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. ... Above the inner core is the outer core, a shell of liquid iron.

Answer 2

Answer:

Hey mate here's your answer...

Explanation:

The internal structure of Earth is layered in

spherical shells: an outer silicate solid crust,

a highly viscous asthenosphere and mantle,

a liquid outer core that is much less viscous

than the mantle, and a solid inner core.

Scientific understanding of the internal

structure of Earth is based on observations

of topography and bathymetry, observations

of rock in outcrop, samples brought to the

surface from greater depths by volcanoes or

volcanic activity, analysis of the seismic

waves that pass through Earth, measurements

of the gravitational and magnetic fields of

Earth, and experiments with crystalline solids

at pressures and temperatures characteristic of

Earth's deep interior.

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