Mountains are formed by the movements of the Earth's crust and tectonic plates. Movements deep beneath the Earth's surface cause a variety of reactions, which results in different types of mountains. Mountains can form as a result of volcanic activity, the collision of two tectonic plates or movement along a fault line.Know More
The forces that form a mountain are generated far below the Earth's surface. Two of the most common forms of mountains are formed by interactions between the Earth's tectonic plates. These theoretical plates form the Earth's crust and upper mantel, and they move independently of one another. When the plates collide, one possible outcome is the formation of mountains. In the case of volcanic mountains, the collision of two plates results in melting rock that rises to the surface. This melted rock or magma breaks through to the surface and slowly builds into a mountain. In other instances, it is blocked and bulges up under the surface. Once it cools, the top layer of soil erodes away, leaving a dome-shaped mountain.
Fold mountains are also a result of two tectonic plates colliding. In the case of fold mountains, however, one tectonic plate buckles and folds up, creating large mountain ranges. When two tectonic plates grind against each other at a fault line, the Earth's surface can rise or fall, which creates fault-block mountains. These mountains usually have steep sides and are bordered by valleys.Learn more about Earth Science
Jacques Piccard was an ocean explorer famous for being one of the first to venture into the Challenger Deep, the deepest part of the ocean and the lowest point on the Earth's crust. Piccard developed a specially reinforced bathyscape called Trieste for the journey. Along with his partner, Don Walsh of the United States Navy, he reached a depth of 35,800 feet beneath the sea.Full Answer >
Sodium is extremely abundant, composing about 3 percent of the Earth's crust, but it is never found in its pure form as sodium metal. This is because of its extreme reactivity, with exposure to air, water and many other substances causing often rapid and very energetic reactions. As such, it is found naturally only in compounds with other elements, such as sodium chloride, also known as table salt, sodium borate, also known as borax, and sodium carbonate, also known as soda.Full Answer >
Aluminum can be found throughout the earth's crust, but it is most commonly extracted from bauxite ore. Because it is so soft in its pure form, most aluminum used for commercial purposes consists of alloys made from refined bauxite mixed with stronger materials.Full Answer >
The solar radiation that heats the Earth's crust is the driving force behind the water cycle. The water cycle is sometimes referred to as the hydrologic cycle and is a process through which Earth's water continuously moves between the surface of the planet and the atmosphere.Full Answer >