1. What is the special feature of the upper mantle? 2 How did scientists come to know that the outer...

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Tanong

1. What is the special feature of the upper mantle? 2 How did scientists come to know that the outer core is liquid? 3. What materials make up the inner core? 4. Is the inner core solid, liquid, or gas? What keeps it in this phase? 5. Compare the inner core and the outer core.​

Mga sagot sa #1 sa Tanong: 1. What is the special feature of the upper mantle? 2 How did scientists come to know that the outer core is liquid? 3. What materials make up the inner core? 4. Is the inner core solid, liquid, or gas? What keeps it in this phase? 5. Compare the inner core and the outer core.​

Answer:

1.The special feature of the upper mantle is the asthenosphere. It is located just below the lithosphere and is made up of rock that is fluid and can move. Its chemical composition is very similar to the crust.

2.Scientists figured out that the outer core must be liquid because S waves do not pass through it, but P waves do. … Thus by observing many seismic waves from many earthquakes all over the world, scientists have been able to work out the density of different parts of the Earth (i.e. the core, mantle, and crust).

3.Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core’s iron-nickel alloys is simply the elements’ chemical symbols—NiFe.

4.The Earth’s inner core is a solid sphere of iron and a little nickel. It is easily hot enough to be a liquid; in fact, the average temperature in the inner core is about 11,100° F (6150° C.) However, the immense pressure on top of it keeps it squeezed into a solid.

5.The inner core and the outer core are made up of similar stuff chemically (both are made mostly of iron, with a little nickel and some other chemical elements)–the difference between them is that the outer core is liquid and the inner core is solid.

Explanation:

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