Give reasons
1.Composition of air is fairly uniform in the lower layers of the atmosphere.
2.Troposphere is an area of turbulence containing much water vapour and dust.
3.Ionosphere is of great help in wireless communication,
4.Ozone is considered a form of oxygen.
Answers
Answer:
1. It consists of 78% nitrogen, 21% oxygen and 1 % other gases and water vapour. The composition of air does not change as you travel through the layers of the atmosphere.
2. The troposphere is the lowermost layer of the atmosphere. Its average height is 13 km and extends roughly to a height of 8 km near the poles and about 18 km at the equator. Thickness of the troposphere is greatest at the equator because heat is transported to great heights by strong convectional currents. This layer contains dust particles and water vapour. All changes in climate and weather take place in this layer. The temperature in this layer decreases at the rate of 1°C for
3. it reflects and modifies radio waves used for communication and navigation. Other phenomena such as energetic charged particles and cosmic rays also have an ionizing effect and can contribute to the ionosphere
4. Ozone is a powerful oxidizing allotropic form of oxygen. It is a pale blue gas and consists of three oxygen atoms. Formed in the ozone layer of the stratosphere, it is harmful to life.