Transformer is a device used for _____.

1. 1. changing the voltage of A.C.
   2. changing D.C. to A.C.
   3. changing A.C. to D.C.
   4. transforming electrical energy to chemical energy

“Galileo Satellites”, named after their discoverer, are four large moons of the planet _____.

1. 1. Saturn
   2. Jupiter
   3. Neptune
   4. Uranus

Light takes nearly 4 years to reach us from the nearest star. What is the distance between that star and the earth?

1. 1. 2.18 x 10¹⁶ m
   2. 2.58 x 10¹⁶ m
   3. 3.78 x 10¹⁶ m
   4. 3.18 x 10¹⁶ m

When and by whom were the rings of Saturn discovered?

1. 1. Galileo; 1610
   2. Newton; 1682
   3. Tycho Brahe; 1590
   4. Edmund Halley; 1682

The visible part of the sun is called _____.

1. 1. Hydrosphere
   2. Troposphere
   3. Ionosphere
   4. Photosphere

What name is given to the path of the sun amongst the stars in our galaxy?

1. 1. Zodiacal
   2. Ecliptic
   3. Elliptical
   4. Celestial sphere

The planets of the solar system travel with the sun through millions of stars in our galaxy at a speed of about _____.

1. 1. 70,000 Km/hour
   2. 80,000 km/hour
   3. 85,000 km/hour
   4. 95,00 km/hour

The planet Neptune’s orbit around the sun takes about _____.

1. 1. 84 years
   2. 165 years
   3. 247.7 years
   4. 29.5 years

A light year, as a unit of measurement of distances of heavenly bodies, is equal to _____.

1. 1. 5 million, million kms
   2. 6 million, million kms
   3. 7 1/2 million, million kms
   4. 9 1/2 million, million kms

What are sun-spots?

1. 1. These are areas of the sun where nuclear fission takes place
   2. These are cooler areas which move about on the sun’s surface and show up as dark spots
   3. These are great flames of gases which shoot out of the sun
   4. These are areas of the sun where the heat is most intense which shows up as dark spots