Identify the Independent variable in the following question. What is the affect of Sun-Earth-Moon system on the development of the calendar? *

The diagram below shows an ornithiscian dinosaur, an ancient bird called archaeopteryx, and the modern day bird. based on the diagram, which of these statements is most likely correct? (2 points) modern day birds have evolved from dinosaurs. archaeopteryx has evolved from modern day birds. ornithiscian dinosaurs had evolved from modern day birds. ornithiscian dinosaurs had evolved from the archaeopteryx.

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 do convection currents form underwater mountains?