3\nwhen rocks return to the earth’s mantle, they can eventually melt and become magma. ______ and ______ are…
3\nwhen rocks return to the earth’s mantle, they can eventually melt and become magma. ______ and ______ are the main factors that control this change.\n○a. pressure; heat\n○b. contraction; expansion\n○c. erosion; weathering\n○d. friction; cold
Answer
Brief Explanations:
When rocks go back to the Earth's mantle, high - pressure and high - temperature conditions cause them to melt and turn into magma. Pressure compresses the rocks and heat provides the energy for melting. Contraction and expansion are not the main factors for rock - to - magma transformation. Erosion and weathering act on the Earth's surface, not in the mantle. Friction and cold do not lead to rock melting in the mantle.
Answer:
A. Pressure; heat