Throughout this course we have talked about the Earth as a planet and also that it behaves with a system that integrates several layers:
- Ecosphere, which is the topic we are going to deal with now. It is the part of our planet in which living beings live.
- Atmosphere. The atmosphere is the outermost layer of the Earth made up of the gases that make up the air.
- Hydrosphere. The hydrosphere is the layer formed bywater, bothsaltyandfresh, ina liquidandsolid, such asglaciers.
- Eart crust. The crust is the solid layer formed by rocks , whose superficial part gives rise to the ground and the seabed.
The biosphere is the system formed by the set of living beings on Earth, which interact with each other and with the atmosphere, the hydrosphere and the lithosphere, living in the air , in the water or on the ground.
- The biotope comprises the abiotic factors, the non-living components, such as location and physical conditions.
- The biocenosis or community is formed by the living components, the organisms that live in the ecosystem. They are biotic factors.