Which of the following rocks and mineral composition is correct for Continental crust?

1. Basalt, Si, Al.
2. Granite, Si, Ma.
3. Granite, Si, Al.
4. Basalt, Granite, Si, Ma.

The average density of earth expressed in g/cm³ is

1. 5.5
2. 2.7
3. 11
4. 4.3

Give reasons for the following:

Core is called Nife.

Give reasons for the following:

Inner core is solid although the temperature is high.