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Earth's core is metallic and has a diameter of about:

A7000 km
B3000 km
C1000 km
D9000 km
Answer & Solution
Correct answer: A. 7000 km
1. It is larger than the planet Mercury. 2. The figure is in thousands of kilometres. 3. It is about 7000 kilometres. _Source: OpenStax Astronomy 2e, Chapter 8, Earth as a Planet._
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