A. Kepler
B. Galileo
C. Copernicus
D. Eratosthenes

A. They are meteors
B. They are the debris which got separated from a comet
C. They emit light due to extremely high temperature caused by friction while they are passing through earth’s atmosphere
D. They are a kind of a star

A. After it enters the atmosphere of the earth
B. After it enters the earth’s atmosphere and explodes in mid air as a ball of fire
C. After it enters the earth’s atmosphere and lands on the surface of the earth without exploding in mid-air
D. Before it enters the earth’s atmosphere

A. Venus
B. Mercury
C. Earth
D. Mars

A. Mercury
B. Earth
C. Jupiter
D. Saturn

A. 60,00,000°C
B. 6,000°C
C. 60°C
D. 0°C

A. Mercury
B. Venus
C. Mars
D. Jupiter

A. 1935
B. 1937
C. 1938
D. 1939

A. Battle of Trafalgar
B. Battle of Jutland
C. End of the World War I
D. The Russian Revolution

A. 1066
B. 1212
C.1215
D. 1217