Scientists believe that some other planets in the universe might have a geologic structure similar t0 Earth's, including a mantle and an outer layer made of plates Imagine that scientists have found a planet with an outer layer divided into plates made of hard, solid rock, but the mantle below the plates is made of hard; solid rock instead of soft; solid rock as it is on Earth plate plate boundary mantle outer layer HW) Do you think plate motion would take place on that planer? Why or why not? Use and highlight ALL the Word Bank words: mantle, plate, outer layer, plate boundary