UNIVERSE
PLANETARY INTERIORS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which statement correctly explains how the inner and outer core differ, and what produces the magnetic field?
|
|
The outer core is closer to Earth’s crust, so it creates the magnetic field.
|
|
|
The outer core is liquid, and its movement causes the formation of a magnetic field. The inner core is solid.
|
|
|
The outer core is made from iron, which causes the magnetic field, but the inner core is nickel.
|
|
|
The outer core has a greater volume than the inner core, and this produces the magnetic field
|
Explanation:
Detailed explanation-1: -Abstract. The Earth has a solid inner core and a liquid outer core, both made of iron and nickel. The metal carries an electrical current that is powered by the movement of the liquid. The electrical current creates a magnetic field that reaches out from the core to the surface of the Earth and beyond.
Detailed explanation-2: -The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.
There is 1 question to complete.