Explain how lightning takes place.

5

(a)

Explain why it is safer to use a wireless telephone instead of a land line telephone during lightning.

5

(a)

During lightning, if you are outside the house, then what precautions would you take?

5

(a)

Priya went to the school with umbrella on rainy season. One day, while returning from the school the rain started on the way. Priya opened her umbrella and saved himself from rainwater. After some time, she observed some lightning sparks in the sky. Sudden, she folded her umbrella and went to a shelter under a closed building.
(a) State the cause of lightning.
(b) Priya folded her umbrella. Explain why.
(c) Mention the method opted by Priya here.

5

(a)

In year 2013, there was a showcase in IIT Hyderabad. All the students from different schools and colleges were invited on that occasion. Naveen with his friends went to see the projects made by M.Tech students. He found a project based on the construction of anti-earthquake buildings in which the small houses of iron rods was constructed. One house was with a hose containing water and the other was without hose.
They shocked on shaking both the houses.
(a) Describe an earthquake.
(b) Explain the meaning of quake-resist building.
(c) Mention which force reduces the shaking in a building with hose.
(d) State the feeling about the students who showed his project.

5

(a)

If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

5

(a)

Mention the name of those regions of the earth that are more prone to earthquake.

5

(a)

Across:
1. The graph used to record seismic waves.
2. The scale used to measure the magnitude of earthquake.
3. Sudden movement in the Earth plates.
4. A method of charging a neutral material.

5

(a)

Explain protection against earthquake.

5

(a)

Explain the mechanism of thunderstorms or story of lightning.

5

(a)