Olympiad Test: Some Natural Phenomena - 1

they acquire equal and similar charges.

they acquire equal and opposite charges.

they acquire unequal and opposite charges.

they acquire unequal and similar charges. 

always attract each other.

sometimes attract each other.

always repel each other.

sometimes attract and sometimes repel each other. 

Richter

Newton

Seismic

Vector 

rain 

snow 

hail 

thunder 

Biosphere

Lithosphere

Magma

Lava 

friction

induction

conduction

all of these 

rubbing it against another body.

touching it to a charged body.

bringing a charged body near it.

all of the  above 

10

15

20

25

to protect tall buildings from lightning flashes.

to measure the strength of lightning.

to protect the building from earthquake.

to measure the strength of the earthquake.

4.5 – 6.5

6.5 – 7.0

7.0 – 7.9

8 or above