Explain the structure of the atmosphere ?

Structure of the atmosphere

The atmosphere can be divided into five layers according to the diversity of temperature and density. They are:

Troposphere

Stratosphere

Mesosphere

Thermosphere (Ionosphere)

Exosphere

Explanation:

Composition of the atmosphere

The atmosphere is made up of different gases, water vapour and dust particles.

The composition of the atmosphere is not static and it changes according to the time and place.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).