1- A unit of length equal to the average distance between the earth and sun is called?
A. Light year
B. Parallax
C. Parsec
D. Astronomical unit
View Answer
Answer : D. Astronomical unit
Description
2- An eclipse of the sun occurs when:
A. The earth is between the sun and the moon
B. The sun is between the earth and the moon
C. The moon is between the sun and the earth
D. The earth casts its shadow on the moon
View Answer
Answer : C. The moon is between the sun and the earth
Description
3- The ozone layer protects the earth from rays sent by the sun:
A. Radioactive rays
B. Infrared rays
C. Gamma rays
D. Ultraviolet rays
View Answer
Answer : D. Ultraviolet rays
Description
4- The ozone layer is present about 30 miles (50 km) in atmosphere above earth. The stratum (layer) of atmosphere in which ozone layer lies is called as:
A. Exosphere
B. Mesosphere
C. Toposphere
D. Stratosphere
View Answer
Answer : D. Stratosphere
Description
5- The planet of the solar system which has maximum numbers of Moon is:
A. Jupiter
B. Venus
C. Saturn
D. Uranus
View Answer
Answer : A. Jupiter
Description
6- Sun is a:
A. Planet
B. Comet
C. Satellite
D. Star
View Answer
Answer : D. Star
Description
7- The age of Solar System is:
A. 4.5 billion years
B. 5.5 billion years
C. 6.5 billion years
D. 7.5 billion years
View Answer
Answer : A. 4.5 billion years
Description
8- Which rocks are formed by the alteration of pre-existing rocks by great heat or pressure?
A. Igneous rocks
B. Sedimentary rocks
C. Metamorphic rocks
D. Acid rocks
View Answer
Answer : C. Metamorphic rocks
Description
9- The most abundant natural iron oxides are:
A. Magnetite and Bauxite
B. Magnetite and Pyrite
C. Hematite and Pyrite
D. Hematite and Magnetite
View Answer
Answer : D. Hematite and Magnetite
Description
10- The most abundant elements in sea water are:
A. Sodium and Calcium
B. Sodium and Potassium
C. Sodium and Chlorine
D. Chlorine and Iodine
View Answer
Answer : C. Sodium and Chlorine
Description
11- An electric current can produce:
A. Chemical effect
B. Magnetic effect
C. Heating effect
D. All of these
View Answer
Answer : D. All of these
Description
12- The unit of home electricity energy consumption is:
A. Watt hour
B. Kilowatt hour
C. Joule hour
D. Kilojoule hour
View Answer
Answer : B. Kilowatt hour
Description
13- The magnet always points in the same direction, if move freely i.e. towards north and south poles, because of:
A. Gravitational field
B. A lot of metals deposits on north and south poles
C. Due to attraction of north pole and repulsion of Western pole
D. Earth is a huge magnet
View Answer
Answer : D. Earth is a huge magnet
Description
14- When sound is reflected from floor, ceiling or a wall, it mixes with the original sound and change its complexion, it is called as?
A. Sound
B. Echo
C. Reverberation
D. Noise
View Answer
Answer : C. Reverberation
Description
15- The speed of sound in dry air at 20°C is about?
A. 130 meters per second
B. 230 meters per second
C. 330 meters per second
D. 430 meters per second
View Answer
Answer : C. 330 meters per second
Description
16- The speed of light in vacuum is about?
A. 300 Million meters per hour
B. 300 Million meters per second
C. 300 Million kilometers per second
D. None of these
View Answer
Answer : B. 300 Million meters per second
Description
17- The time light takes from Sun to reach Earth is:
A. 8 minutes 20 second
B. 25 minutes 10 second
C. 45 minutes 33 second
D. 60 minutes 45 second
View Answer
Answer : A. 8 minutes 20 second
Description
18- Light from Sun travels a distance before it reaches Earth:
A. 50 Million Km
B. 100 Million Km
C. 150 Million Km
D. 200 Million Km
View Answer
Answer : C. 150 Million Km
Description
19- The most suitable thermometer for measuring the boiling point of water is:
