About 75% of total mass of the atmosphere and 90% of its water vapour is contained in the lowest zone which extends from the earth's surface to an altitude of about 8 km at the poles and 16 km at the equator. What is called this lowest zone?
Oxygen (21%) orgon (0.93%) and carbon dioxide (0.03%) are the components of atmosphere. What is the percentage of Nitrogen (by volume) in the composition of atmosphere?
All the matter in the universe was once packed close together. A huge explosion made all this matter fly apart. All the galaxies were formed from this matter and they are still moving away from each other. What this theory about the beginning of the universe is called?
Clouds are visible collection of water droplets that are suspended in the atmosphere. What are called those clouds whose lower surfaces touch the ground?
The equator runs through the centre of the earth and the centre of earth remains exactly in the same position in relation to the sun throughout the year. Due to this phenomenon where the days and nights are equal throughout the year?
