1pt The process by which rock minerals are changed by natural processes into new substances is known as: O A. erosion.
O B. chemical weathering.
O C. sedimentation.
O D. mechanical weathering.

The answer is A because you have to have erosion

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Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the north and south. jet streams follow the boundaries between hot and cold air. the earth's rotation is responsible for the jet stream as well.