Sophia was studying with Maalik about the layers of the Earth. They were given several different statements about the layers.

Question

Which statement about the layers would they identify as correct?

The outer core is less than 70 km in thickness.
The crust assists in forming Earth’s magnetic field.
The mantle is denser than the crust.
Pressure increases when moving from the core to the crust.

Answer 1

The correct statement among the ones provided is: The mantle is denser than the crust.

Here's a brief explanation of why the other statements are incorrect:

1. The outer core is less than 70 km in thickness. - This is incorrect; the outer core is much thicker, approximately 2,200 km.

2. The crust assists in forming Earth’s magnetic field. - This is incorrect; the outer core, which is liquid iron and nickel, is primarily responsible for generating Earth's magnetic field, not the crust.

3. Pressure increases when moving from the core to the crust. - This statement is also incorrect. Pressure actually increases as you move from the crust towards the core, not the other way around.

Thus, the only correct statement is that the mantle is denser than the crust.