261. We observe twinkling of stars due to
- A. frequent and periodic fluctuations of temperature of the surface
- B. Constant change of refractive index of the medium between the stars and the Earth because of temperature variation
- C. great distance of stars from the Earth
- D. rise and fall of gaseous ball of fire inside the stars
- Check Answer | Discussion
262. Which of the following is the biggest bay in the world?
263. The Pennines (Europe), Appalachians America and the Aravallis (India) are examples of
264. The greatest seasonal contrast of insolation on the Earth is, in which of the following latitudinal zones?
265. Where does the ethnic group called Dayak live?
266. Maximum human population belongs to the
267. What approximate percentage of words population lives in Asia?
268. Which one among the following is the largest temperate desert of the world?
269. The waterfall 'Victoria' is associated with the river?
270. Which one among the following is the longest continuous mountain range in the word?
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