पृथ्वी का क्रोड मुख्य रूप से लोहे और निकेल से बना है, इसलिए इसे कभी-कभी किस नाम से जाना जाता है?

The portion of the interior of the Earth beyond the crust is called the mantle. What is the weaker upper zone of the mantle called?

Which among the following are indirect sources of information about the interior of the Earth? A. Volcanic eruptions B. Seismic activity C. Magnetic field D. Gravitational force Choose the correct answer from the options below: