Fusing heavier elements together requires much denser and hotter conditions in a star’s core. Use this idea and the concept of gravity to explain the difference in the types of elements a 1 and 20 solar mass stars produce. (1 solar mass = low mass, 20 solar mass = high mass)

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.