What minerals can be cut and polished giving them a beautiful appearance are called

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.

How long does it take neptune to orbit the sun?

Answer this asap. why did the americans go to china? a. trading b. exploration c. land d. live stock