definition of atmosphere,lithosphere and Biosphere
Answers
Answer:
Search Results
Featured snippet from the web
The lithosphere consists of solid rock, soil and minerals. The hydrosphere consists of water in all its forms. The atmosphere is the layer of gases around the Earth. The biosphere consists of all living plants and animals and their interactions with the rocks, soil, air and water in their habitats.
The atmosphere
The atmosphere includes all the air above the surface of the Earth all the way to space. All the gases that are present in the air are included in the atmosphere. Most of the atmosphere is found close to the surface of the Earth where the air is most dense. The air contains 79% nitrogen, less than 21% oxygen, and a small amount of carbon dioxide and other gases. We will look more closely at the atmosphere later on in this chapter.
The lithosphere
The lithosphere includes the Earth's crust and the upper part of the mantle. All mountains, rocks, soil and minerals included in the Earth's crust are part of the lithosphere. Even the seafloor is part of the lithosphere, because it is also made up of sediments of sand and rock. We will look more closely at the lithosphere in the next section.
All the rocks, soil and sand on Earth form part of the lithosphere, as shown in the following photographs.
The Biosphere
The biosphere includes all life on Earth - plants, animals and humans. Most of what is studied in Life and Living is about the biosphere. The biosphere also includes life in the oceans, and under the soil. For example bacteria living on decaying plant material and the smallest sea creatures and plants are part of the biosphere. Almost all the life on the planet is found between 3 meters below the surface of the Earth, up to 30 meters above the ground, and in the top 200 meters of the oceans.