Which fossil below is a trace fossil? O petrified wood
O preserved insect
O mold of a fish
O dinosaur track

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.

What is a compass? how does it work

Explain why components that are naturally found in air can be considered air pollutants.