Answer: Volcanoes form at B when the oceanic plate is subducted, and the plate melts and forms magma. This magma rises towards the surface and erupts as lava which forms the volcanoes. It can be found in Pacific Northwest in northern CA, Oregon and Washington. The boundary in B shows converging plate boundary. An oceanic plate collides with a continental plate. The result is the oceanic plate sinks below a deep ocean trench into the mantle. The boundary shown in A is a diverging plate boundary. 2 oceanic plates diverge to form a mid-ocean ridge.
Exceptions to A and B are when volcanoes form at hot spots in the middle of continental or oceanic plates. Magma melts through the crust and moves to the surface in a hot spot. Also a collision between two oceanic plates can form volcanoes. One of the oceanic plate is subducted which melts the plate and the formation of magma which erupts to form a chain of volcanic islands called an island arc.
Explanation: I took the test and aced it so i hope this helped
Answer:
Astronomers used the cross-staff for measuring the angle between the directions of two stars. ... Ships' officers used it to measure the elevation angle of the noontime Sun above the horizon, which allowed them to estimate their latitude
Explanation:
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Answer: Two hydrogen nuclei come together to produce one helium nucleus and two protons, and energy is released.
Explanation:
All stars (including the Sun) at birth begin to fuse two hydrogen nuclei to form helium through nuclear fusion.
In this sense, nuclear fusion is the union of two light atoms, releasing energy in the process, which is the cause of the great luminosity of a star. Especifically, the hydrogen nuclei will begin to fuse, generating helium nuclei in the process and releasing huge amounts of energy.
To unerstand it better:
To shine, the stars transform their hydrogen into helium by means of nuclear fusion. When at half of its life a star is without hydrogen, the nucleus becomes entirely helium and the star declines, becoming colder and brighter due to the energy generated by the nuclear reactions, then the star begins to contract.
Nevertheless, if the star is bigger, this helium will be also consumed and the nucleus transformed in Carbon, then in Oxigen, and so on. Being the last transformation Iron until the star delivers all its energy.
Answer:
A. is a gravity-driven downslope movement of natural materials.
Explanation:
Mass movement -
It is also called , the slope movement , mass wasting .
it is a process , by which , the sand , rock , soil , regolith move towards downslope by the force of gravity .
It includes , slides , falls , topples , creep .
Mass movement is observed in planets other than Earth , like the Mars , Jupiter , Venus .
Hence , from the given option , the correct option for the definition of Mass movement is ( A ) .
Answer:
One side of the moon always faces the earth, which is called synchronous rotation. In other words, the length of time the moon rotates or revolves around its axis is the same as the length of time it takes to orbit the earth... Therefore, our moon always has a side facing the earth, which we call the near side of the moon.
