Consider the following 1 The inner core of the earth is liquid while the outer core is solid 2 The i...........

Geography Earth Geology

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Consider the following:

1. The inner core of the earth is liquid while the outer core is solid.

2. The inner core mainly consists of an alloy of Iron, Aluminum and Manganese.

3. The inner and outer core is separated by Lehman Discontinuity.

Which of the above statements are correct?

1&3 only

1&2 only

3 only

All of the above

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Explanation:

The Earth's inner core is the Earth's innermost part and according to seismological studies, it has been believed to be primarily a solid ball with a radius of about 1220 kilometers, or 768 miles (about 70% of the Moon's radius). It is composed of an iron–nickel alloy and some light elements. The temperature at the inner core boundary is approximately 5700 K.
The outer core was determined to be liquid from observations showing that compressional waves pass through it, but elastic shear waves do not – or do so only very weakly.