Question

sophia was studying with maalik about the layers of the earth. they were given several different statements about the layers. 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.

Explanation:

1. Analyze each option:

• Option 1: The outer core is actually about 2200 km thick, so "less than 70 km" is wrong.
• Option 2: The Earth's magnetic field is formed by the outer core (liquid iron - nickel movement), not the crust.
• Option 3: The mantle (density ~3.3 - 5.5 g/cm³) is denser than the crust (density ~2.7 - 3.0 g/cm³), so this is correct.
• Option 4: Pressure decreases when moving from the core (high pressure) to the crust (low pressure), so this is wrong.

Answer:

The mantle is denser than the crust. (The option with the statement "The mantle is denser than the crust.")