What do scientists think happens in the core to produce the Earth's magnetic field? A. The solid inner core of iron and nickel act as a large magnet.

B. The outer liquid core becomes magnetized by the rapid spin of the solid inner core.

C. The liquid iron and nickel outer core's motion in relation to the metallic solid inner core becomes a geodynamo.

A

Explanation: I just took a test about it and A was the answer.

It is C

Explanation:

A geodynamo is the movement of the liquid outer core, which cases the powerful magnetic field of the Earth.

i took a test for bio that had this question and these were the correct answers, not sure if this is any now lol

the nervous system and the muscular system work together.  

sweat reaches the surface of the skin and evaporates into the air.

muscles underneath the skin relax, causing hair on the skin to lay flat.

the correct answers are;

a. the rock was made from more than one type of material.

e. layers of hot liquids in the rock cooled and solidified at different temperatures.

these are the two options that are related to the statement given above.