Earth science is an important part of geology. Earth science deals with the physical composition of the earth and its atmosphere. Without understanding this branch of geology, knowing how the earth works is not possible. Earth science involves many aspects, including the earth’s atmosphere and rock formations, and it is here where we will be focusing our attention.
Five interconnected parts compose the Earth’s atmosphere. The collection of materials and processes of one part are different from that of the other. However, they are not independent, as each part interacts with the other.
A number of gasses make up the earth’s atmosphere including 78% nitrogen, 21% oxygen and 1% other gasses. The atmosphere is present way above the earth’s surface and becomes thinner as it reaches the space. The earth’s atmosphere consists of five layers. The first of these layers is where weather and clouds are found.
All the life present on earth is known as biosphere. This includes all things that inhibit the earth including remains of the deceased. All the life present on land and in the ocean such as plants, animals, fungi, bacteria, etc. make up the biosphere of the earth.
Consisting of all of the rocks of the earth’s crust, whether it is the rock that lies underneath the crust, the rock near the earth’s core or the core itself, comprise the lithosphere and is the planet’s solid outer core. The Lithosphere is where major catastrophes such as earthquakes and volcanoes occur.
Hydrosphere is all the water that the earth encompasses including all the oceans, rivers, lakes, streams, groundwater, water vapor, and even a pool of water. About seventy percent of the earth’s surface is covered with water and a good part of this water is the ocean. Water is a major necessity of life whether it is used for drinking, cooking, cleaning or agriculture purposes.
Finally, we come to the cryosphere. Cryosphere includes all of the planet’s frozen areas such as snow, glaciers, and ice present in the sea. Covering the earth’s surface, Cryosphere is usually visible during the winters.