Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The Air Around Us 1) Wind: *The moving air is called wind. *Winds are very important for life on Earth. *They blow clouds over the sea where they pick up moisture . *These clouds are then driven by winds over the land, where they bring much needed rain during the monsoons. 2)Atmosphere: *The Earth is covered by a huge blanket of air is known as Atmosphere. *It extends to about 200kms above the surface of the Earth. 3)Layers of Earth: The atmosphere has 5 different layers. They are:The troposphere The stratosphere The mesosphere The thermosphere The exosphere. 4)Troposphere: *The troposphere is the layer closest to the Earth. *It is the layer in which we live. *It extends upwards for upto 16kms above the surface of the Earth. *Formation of clouds and weather changes takes place in this layer. 5)Stratosphere: *It lies above the troposphere. *This layer has the ozone layer in it. *The ozone layer protects all life on Earth from the harmful rays of the sun. 6)Mesosphere: *Mesosphere is the 3rd layer of the atmosphere. *It is the coldest layer. *Meteors burn in this layers. 7)Thermosphere: *This layer very thin and hot. *Satellite move in their corresponding orbit in this layer. 8)Exosphere: It is the uppermost layer of the atmosphere and it leads to open space. 9)Components of air 10)Nitrogen: *It is the major component of air (78%). *Nitrogen is used to make fertilizers to crops. *Plants need these nitrogeneous substance to grow better. *All proteins contain some amount of nitrogen in them. *All living things need protein for their growth. 11)Carbon-di-oxide: *CO2 is presented in very small amount in the atmosphere. *Plants need this gas to prepare food. *CO2 traps the heat from the sun and helps to keep the Earth warm. 12)Oxygen: *O2 is the other major gas present in air. *It makes up about 21% of air. *It is essential for life. *Living organisms breathe in O2. *In the body, it helps convert the carbohydrates and fats we eat into energy. *O2 is needed for burning-without it, there would be no fire. 13)Pollution: The addition of substances to the environment in quantities which are harmful for living beings is known as pollution. ---------------------X----------------------------