"FORCE & NATURAL": HTML5 Crossword

Across

2. Force per unit area (8)
4. Like charges ............ each other (7)
6. Name the device used to protect buildings from lightning. (9,9)
8. What are weak zones called? (7,5)
10. The electric charges generated by rubbing are called ............ charges (6)
11. Who discovered the static electricity or lightning in clouds (8,8)
14. Sudden shaking and trembling of earth is called (10)
15. What is the uppermost layer of the earth called? (5)
16. The strength of a force is usually expressed by its (9)

Down

1. Example for contact force (8)
3. What is the SI unit of pressure? (6)
5. A device used to test whether an object is carrying a charge or not (12)
7. Name the force due to which every object falls on earth (13,5)
9. A push or pull on an object is called................. (5)
10. Waves produced on the Earth’s surface because of tremors. (7,5)
11. What is the name of the instrument used to measure atmospheric pressure? (9)
12. What kind of force is an electrostatic force? (3,7)
13. SI unit of force (6)