Question : A person can jump higher on the moon's surface than on the earth because : 

Option 1: The moon's surface is rough

Option 2: the acceleration due to gravity is smaller than that on the earth

Option 3: the moon is cooler than earth

Option 4: the moon has no atmosphere

Question : Heat from the sun reaches the Earth by:

Option 1: reflection

Option 2: conduction

Option 3: radiation

Option 4: convection

Question : Intensity of gravitational field of earth is maximum at

Option 1: Poles

Option 2: Equator

Option 3: Centre of earth

Option 4: Surface

Question : Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by:

Option 1: Carbon dioxide

Option 2: Ammonia

Option 3: Chlorine

Option 4: Ozone

Question : A bomb explodes on the moon. You will hear its sound on the Earth after _____.

Option 1: 20 minutes

Option 2: 2 hours and 20 minutes

Option 3: 3.7 hours

Option 4: You cannot hear the sound of explosion