The average density of which among the following varies from 3.5 to 5.5? 

The solid outer layer of the Earth,consisting of various rocks and minerals is called the 

Which among the following is about 3000 km thick? 

Hot rocks form magma in which layer?

Which among the following is thicker under the continents than under the ocean floor? 

Which among the following is rich in iron and magnesium?

What is the outer most crust of the Earth which is also the thinnest layer? 

Which is the most inaccessible part lying at the center of the Earth? 

The Earth's core is divided into how many parts? 

Which among the following forms the ocean floor?