Discuss how scientists observe and make inferences to learn about the earth's history, i.e.: reading rocks and studying fossils.
(scientists; make; inferences; to learn about the earth's history) Context(scientists make,List([12, 39))):(scientists; make to learn; about the earth's history)
scientists make,List([12, 39))
scientists scientists
make make to learn
inferences to learn about the earth's history
about the earth's history