Here’s a fun fact: soil can be considered the interface of the four spheres. It comprises external processes that we can observe on the surface and internal processes deep within. The geosphere is the largest out of all the spheres, extending from the surface of the Earth down to its center. This could range from bustling cities, lush tropical rainforests, arid deserts, or even extreme environments like the bottom of the ocean floor. The biosphere refers to the narrow band on the Earth’s surface where all biological life resides. The remaining 2.6% comprises fresh water stored in glaciers, ice caps, and underground reservoirs.Īlthough freshwater makes up only a tiny fraction of the total, we and other Earth residents rely on it for survival. Nearly 97.4% of the water in the hydrosphere is composed of saline or salt water found in vast oceans covering the Earth. This sphere covers nearly 71% of the Earth’s surface.
The hydrosphere refers to the bodies of water consisting of freely flowing bodies of water found on the surface of the Earth, as well as water reservoirs stored below the ground as groundwater. More about the atmosphere will be covered later on. The atmosphere is essential to life on Earth because (1) It shields the Earth and its inhabitants from harmful ultraviolet (UV) radiation from the Sun (2) it maintains the warmth of the Earth’s surface and (3) it contains all of the essential gases needed to support life. It can be further divided into different layers based on characteristics.
The atmosphere is a collective layer of gas that envelopes the Earth. We can divide them into four major spheres a. The Earth is composed of systems or “spheres”, each having their unique properties, that continuously interact with one another. Earth’s Vital Statistics and Earth SystemsĪccording to the data from NASA, the Earth’s vital statistics are as follows: Part I: Geology Part II: Meteorology and Oceanography Part III: Astronomy Earth’s Vital Statistics and Earth Systems Climate, Weather, and the Atmosphere A Brief History of Astronomy The Layers of the Earth and Its Composition The Origin of the Universe and the Solar System Minerals The Solar System and Its Planets Rocks How the Earth Was Formed Depositional Environments, Landforms, and Waterforms The Motions of the Earth Basics of Stratigraphy The Motions of the Moon Fossils and the Geologic Time Scale Other Celestial Bodies in Space Plate Tectonics Earthquakes Volcanoes 1.
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