What is the rate of change of temperature inside the earth?

1. Temperature decreases at the rate of 1°C for every 32 metres of descent.
2. Temperature increases at the rate of 1°C for every 32 metres of descent.
3. Temperature remains constant
4. Temperature decreases at the rate of 32°C for every 1 metre of descent.

Sial is the part of …………… .

1. Mantle
2. Core
3. Crust
4. Sima

Gutenburg Discontinuity separates …………… & ……………

1. Crust & Core
2. Core & Mantle
3. Mantle & crust
4. Sial & Sima

Mesosphere is another name of …………… .

1. Crust
2. Core
3. Mantle
4. Sima