Which of the following statements about Earth's core is true?
A)Once molten, the core has gradually solidified as it cooled.
B)P-waves cannot travel through this layer of Earth.
C)The core makes up about 1/3 of Earth's volume.
D)The core is mostly made of iron.

Question

Quizplus · Accepted Answer

The statement "The core is mostly made of iron" is true, as studies have shown that the Earth's core is comprised mainly of iron and nickel. A is false, as the outer core is actually still in a molten state. B is partially true, as P-waves do experience a drastic increase in speed when passing through the inner core, but they are able to travel through it. C is false, as the core actually makes up about 1/3 of the Earth's mass, not its volume.

Which of the Following Statements About Earth's Core Is True