The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.
The Asthenosphere is made up of semi-plastic rock. Since the Lithosphere has a lower density, it floats on top of the Asthenosphere similar to the way in which an iceberg or a block of wood floats on water. The lower mantle below the Asthenosphere is more rigid and less plastic. Below the Mantle is the outer …
the exosphereThere is a fifth layer called the exosphere, where the atmosphere gradually thins and merges with interplanetary space, but we won’t consider this further as the molecules are so far apart, it no longer behaves like a gas.
The atmosphere is a protective layer of gasses that shelters all life on Earth, keeping temperatures within a relatively small range and blocking out harmful rays of sunlight. The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude.
the stratosphereMost atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the Earth’s surface (see the figure below). Ozone is a molecule that contains three oxygen atoms. At any given time, ozone molecules are constantly formed and destroyed in the stratosphere.
Option a: Troposphere is regarded as the most important layer of atmosphere. It is the lowermost layer of the atmosphere and contains 75% of all air in the atmosphere.
Earth Designations Alternative names Gaia, Terra, Tellus, the world, the globe Adjectives Earthly, terrestrial, terran, tellurian Orbital characteristics Epoch J2000
All of the planets, except for Earth, were named after Greek and Roman gods and godesses. The name Earth is an English/German name which simply means the ground. It comes from the Old English words ‘eor(th)e’ and ‘ertha’. In German it is ‘erde’.
Mercury Facts Mercury is one of the five planets known to the ancients. They called these planets “wandering stars.” Mercury may be seen as an evening “star” near where the sun has set, or as a morning “star” near where the sun will rise.
A pair of researchers from Toho University and NASA Nexus for Exoplanet System Science has found evidence, via simulation, that Earth will lose its oxygen-rich atmosphere in approximately 1 billion years.
