11. The Earth is an oblate spheroid and not a perfect sphere. This is because
1. the Earth has a rotational motion and the rotational speed increases as one goes from the Poles towards the Equator.
2. the Equator experiences greater gravitational pull from the Sun.
3. the intensity of sunlight received at the Equator is greater than that at the Poles.
1. the Earth has a rotational motion and the rotational speed increases as one goes from the Poles towards the Equator.
2. the Equator experiences greater gravitational pull from the Sun.
3. the intensity of sunlight received at the Equator is greater than that at the Poles.
12. Which of the following countries are located on the Greenwich Meridian?
1. Algeria
2. Germany
3. Guinea
4. Iceland
1. Algeria
2. Germany
3. Guinea
4. Iceland
13. Owing to the equatorial bulge and the polar flattening, the polar radius of the earth falls short of the equatorial radius by about ________
14. Which one of the following is the correct sequence of the given continents in the decreasing order of their percentage of Earth's land?
15. What is the approximate equatorial circumference of the earth?
16. Who among the following was first to measure the circumference of the Earth?
17. What is the circumference of the Earth?
18. Who was the first to measure the circumference of the Earth?
19. Beirut time is two hours ahead and Lima time is five hours behind GMT. The longitudes of Beirut and Lima are respectively ________
20. The total surface area of earth is ________
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