Some natural phenomenon Worksheet-6

Some natural phenomenon Worksheet-6

 

True of false:

  1. Lightning is an electric spark, but on a small scale.

  2. Benjamin Franklin showed that lightning and the spark from clothes are the same phenomena

  3. The electrical charges generated by rubbing are in motion.      

  4. When charges move, they constitute an electric current.  

  5. Electrical charge can be transferred from a charged object to another through a metal insulator.

  6. During thunderstorm, the air currents move upward while the water droplets move downward.

  7. The process of electric discharge can occur between two or more clouds

  8. Lightning can strike telephone cords, electrical wires and metal pipes      

  9. Electrical lights can cause harm during lightning.    

  10. Metallic rod of lightning conductor must be taller than the building in which it is installed. 

  11. One end of metallic rod of lightning conductor should remain open to conduct lightning.    

  12. Earthquake is caused by the disturbance deep inside the earth’s crust.     

  13. Tremors on the earth are caused when a meteor hits the earth.         

  14. The center of the earth plates is the weak zones where earthquakes are more likely to occur.

  15. Seismograph is a device used to record waves produced by movement of earth plates.

 

Answer:

  1. False; Lightning is an electric spark, but on a huge scale.

  2. True

  3. False; the electrical charges generated by rubbing are static.

  4. True

  5. False; Electrical charge can be transferred from a charged object to another through a metal conductor.

  6. False; during thunderstorm, the air currents move downward while the water droplets move upward.

  7. True

  8. True

  9. False; Electrical lights do not cause any harm during lightning.

  10. True

  11. False; One end of metallic rod of lightning conductor should be buried deep in the ground.

  12. True

  13. True

  14. False; The boundaries of the plates are the weak zones where earthquakes are more likely to occur.

  15. True