The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken up into tectonic plates. The Earth's lithosphere is composed of seven or eight major plates (depending on how they are defined) and many minor plates. Where the plates meet, their relative motion determines the type of boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The relative movement of the plates typically ranges from zero to 100 mm annually.[2]
Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the lithosphere remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories, since disproven, proposed gradual shrinking (contraction) or gradual expansion of the globe.[3]
Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.
The answer is subarctic
A latitude is a measure of position north or south of the equator. On the equator, the latitude is 0 degrees, and on the poles, it is 90 degrees. The high-latitude climates are in high latitudes, thus on the poles. the subarctic climate spreads between 50 and 70 degrees of latitude, thus, it belongs to the high-latitude climate.
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The answer is: He purchases licensed copies of an innovative new animation software.
Physical capital refers to the capitals that is can be used as primary factors of production. Innovative new animation software can be considered as one of the primary factors because it can dramatically improve the quality of the company's end product and reduce the time needed for the operation.
The correct answer is four states.
California
Arizona
New Mexico
Texas
