Which factors contribute to changing igneous and sedimentary rocks into metamorphic rocks?
weathering
a. weathering
b. erosion
c. heat
d. deposition
e. pressure

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory