Guys can you please help me for about these questions some natural phenomena for true or false

Solution 

1. The electric charges produced by rubbing are called static charges. Hence this Statement is true. 
2. The process of transferring charge from a charged object to the earth is called earthing. Hence this statement is true. 
3. A device used to protect tall buildings from lightning is called lightning conductor. Hence the third statement is false.
4. During earthquake we should take shelter under heavy table. Hence this is true. 
5. The waves are recorded by a seismograph. Hence this is false. 
6. An earthquake lasts for a short time. Hence this is false. 
7. A lightning conductor is fixed at the roof of the building. Hence this is false. 
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