881. A unit length equal to the average distance between the earth and the sun is called:
A. Light Year
B. Astronomical Unit
C. Parsec
D. Parallax
E. None of these
882. An eclipse of the sun occurs when:
A: The moon is between the sun and the earth
B: The earth is located between the earth and the sun
C: The moon is influenced by the earth’s shadow.
D: None of these
883. The ozone layer protects the earth from rays sent down by the sun:
A. Ultraviolet rays
B. Infrared rays
C. Gamma rays
D. Radioactive rays
E. None of these
884. The ozone layer is present about 30 miles (50km) in the atmosphere above the earth. The stratum (layer) of the atmosphere in which the ozone layer lies is called as:
A. Exosphere
B. Mesosphere
C. Stratosphere
D. Ionosphere
E. None of these
885. 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
E. None of them
886. The most abundant natural Iron oxides are:
A. Magnetite and pyrite
B. Magnetite and Bauxite
C. Hematite and Pyrite
D. Hematite and Magnetite
E. None of these
887. The two most abundant elements in seawater are:
A. Sodium and potassium
B. Sodium and Calcium
C. Sodium and chlorine
D. Chlorine and Iodine
E. None of them
888. The “Rising” of the “evening star” indicates the direction of the_______?
A: East
B: South Pole
C: West
D: North
889. The SI unit of charge is _?
A: Coulomb
B: Ampere
C: Ohm
D: Volt
890. A convex mirror always __ ?
A: Forms a virtual image
B: Forms a real image
C: Forms an inverted image
D: Produces a larger image
Admin