1. The process of transfer of charges from a charged object to the earth is called

2. The power of an earthquake is expressed on a scale called

3. Which instrument is used to measure earthquake?

4. Which is not a natural phenomena?

5. How many types of charges are gained by rubbing objects?

6. Where is the lightning rod attached to protect the building from lightning?

7. Lightning always follows

8. Tsunami means

9. The waves produced on the earth’s surface is called

10. Amber is a