What are the two main forces that cause surface changes on earth?
a. erosion and plate tectonics
b. chemical and physical weathering
c. plate tectonics and weathering
d. weathering and erosion

read the sentence below and answer the question that follows. one of the norms in the village was to meet at the town square on fridays for a community dinner and dance. the underlined word in the sentence above is best defined as a a. cultural element shared by all people around the world b. specific area in a town used for traditional community events c. religious custom accepted and practiced by all members of a village d. behavioral pattern that is regularly accepted by a group of people

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.