1. When there is an active upward ascent of lighter warm air over the cold dense air, the front is called:

2. Instrument used for the measurement of wind speed is called ?

3. The continental crust ranges from:

4. Atmospheric pressure at sea level is:

5. The hot molten material erupted from a volcano is called:

6. yardang is produced by:

7. Vernal equinox occurs on:

8. On 21st of June the sun shines vertically on the:

9. Marble is a:

10. The point in the earth from where seismic waves spread out in all directions is: