In which century the early attempt of estimating the size of the earth was made ?
First
Second
Third
Fourth
Which layer present in the atmosphere absorbs harmful ultra violet radiations?
Keratin layer
Ozone layer
Radiation layer
None of thes
Polestar appears vertically overhead at the ----------- .
South Pole
North Pole
Equatorial region
None of this
What is the average speed of the revolution of the Moon around Earth?
3,750 Km
3,600 Km
3,700 Km
3,650 Km
From the following which is the optimum distance between sun and earth.
150 million light year
150 million Km
1000 million light year
1000 million Km
Who was the first to circumnavigate earth?
Vasco de Gama
Christopher Columbus
Magellan
Alexander
The weight of a substance is related to the effect of force of ------- on that substance.
Friction
Wind
Gravity
None of these
Which is the hottest planet in the solar system?
Venus
Mercury
Earth
Jupiter
Which position does the Earth stands in terms of size in our solar system?
7th
3rd
5th
2nd
The first attempt of estimating the size of the earth was made by whom?
Pythagoras
Hyppocrates
Eratosthenes