2. Look at the diagram
What does this diagram represent?

Which of there factors contributed most to us westward expansion in the second half of the nineteenth century?

How does the slope of the land affects the speed of lava flow

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.