1671. The planet of the solar system which has maximum number of moon is :

A. Jupiter *
B. Venus
C. Saturn
D. Uranus

1672. Sun is a :

A. Planet
B. Aurora
C. Satellite
D. None of them *

1673. The age of the solar system is :

A. 4.5 Billion years *
B. 5.5 Billion years
C. 6.5 Billion years
D. 7.5 Billion years

1674. A unit lenght equal to the average distance between the Earth and sun is called :

A. Light year
B. Astronomical unit *
C. Parsec
D. Parallax

1675. An Eclipse of the sun occurs when :

A. The moon is between the sun and the earth *
B. The sun is between the earth and the moon
C. The earth is between the sun and the moon
D. None of the above

1676. The ozone layer protects the earth from rays sent down by the sun :

A. Ultraviolet rays *
B. Infrared rays
C. Gamma Rays
D. None of these

1677. The Ozone layer is present about 30 miles ( 50 KM) in atmosphere above the earth . The stratum (Layer) of atmosphere in which ozone layer lies is called as :

A. Exospere
B. Mesophere
C. Stratosphere *
D. Ionosphere

1678. Which rocks are formed by the alternation of pre-existing rocks by great heat or pressure ?

A. Igneous rocks
B. Sedimentary rocks
C. Metamorphic rocks *
D. Acid rocks

1679. The most abundant natural iron oxides are :

A. Magnetic and pyrite
B. Magnetic and Bauxite
C. Hematite and Magnetite *
D. None of them

1680. The two most abundant elements in sea water are :

A. Sodium and potassium
B. Sodium and Calcium
C. Sodium and chlorine *
D. None of them