Cyclones form over the warm Oceans in the low latitudes during the hottest months of the year. What should be the ration of storm's winds before it is designated as a cyclone?
The Kalahari desert in southwest Africa, Sahara in North Africa, the Arabian in Middle East, the Gobi in East Asia are among the world's greatest deserts. Which is the largest one?
There are four kinds of drought, permanent drought is found in arid and semi-arid regions, seasonal drought occurs in climates with definite dry and rainy season, unpredictable drought, where normal rainfall has failed to come. What is invisible drought?
Earth is the only planet in the solar system on which the presence of living things is definitely known. Together with its single moon it revolves around the sun at an average distance of:
