Which part of Earth is a dense sphere at the center made of iron and nickel?

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Prepare for the WJEC GCSE Chemistry Exam with multiple choice questions and detailed explanations. Enhance your knowledge and boost your confidence. Get exam-ready today!

Multiple Choice

Which part of Earth is a dense sphere at the center made of iron and nickel?

Explanation:
The central part is the inner core. It’s a dense solid sphere made mainly of iron and nickel, kept solid by the immense pressures at Earth's center. Surrounding it is the outer core, which is liquid iron–nickel and helps generate Earth’s magnetic field. The crust and mantle are rocky and less dense, sitting above the core. So the description matches the inner core precisely.

The central part is the inner core. It’s a dense solid sphere made mainly of iron and nickel, kept solid by the immense pressures at Earth's center. Surrounding it is the outer core, which is liquid iron–nickel and helps generate Earth’s magnetic field. The crust and mantle are rocky and less dense, sitting above the core. So the description matches the inner core precisely.

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