The inner core of the earth is molten due to the enormous heat and pressure in the region. This heat is also fed by the natural decay of radioactive elements in the earth interior. The earth core has a molten outer core of mainly iron and nickel metals that churn due to convection current and spin like a funneled tornado due to the earth rotation. The metals are also ionized (due to the high temperatures) and hence act as an electric current as they churn and produce magnetic fields (that extends around the earth to outer space). There are usually disturbances in churning (that cause incremental instabilities in the magnetic field) and if well-pronounced result to the reversal of the earth’s magnetic fields.
Answer:
The spread of information to many people
The sharing of scientific knowledge and discoveries
A decrease in cost of all books
Explanation:
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