2. Hank passes by a building every day on his way to school. He notices that the
rock used to build the walls of the building is a different type than the rock
used to build the steps. How could energy have played a role in the different
rock types forming?
a Energy from different sources leads to different types of rock. Energy inside
Earth melts rock into liquid rock, but energy from the sun causes rock to
weather into small pieces of rock.
b Energy causes different types of rock to change in different ways. Energy
changes igneous rock into liquid rock and changes sedimentary rock into
small pieces of rock.
c Energy caused one rock type to form, but not the other. Rock that forms
because of energy is a different type of rock than rock that forms without
energy.
d Energy changes rock on different continents in different ways. Each
continent on Earth has different rock that might form liquid rock or small
rock pieces when exposed to energy.