1. The upper portion of the mantle is known as

2. Which one of the following is a direct source of the information about the interior of the Earth?

3. What is the density of the rocks between the adjoining line on mantle and core?

4. What is the approximate depth of the mantle?

5. The Deccan trap is a large

6. What is the thickness of the crust?

7. What is the mean thickness of oceanic crust?

8. The intensity of an earthquake is measured in