2EROSION All the natural processes that wear away earth and rock. Sometimes fossils are uncovered by erosion caused by wind or rain.
3The data used to draw a conclusion EVIDENCEThe data used to draw a conclusionWhat have you learned about this dinosaur from the evidence you’ve found so far?
4EXCAVATION The process of finding something by digging for it. What did you find on your recent excavation of the land?
5EXTINCT No longer living on the earth; having died out. Why do you think dinosaurs became extinct?
6FOSSILSThe hardened remains of animals or plants of prehistoric times.The scientists examined many fossils.
7GEOLOGISTS Scientists who study the earth’s crust and its rocks. There is a team of geologists working at the site digging up fossils.
8HYPOTHESES Scientific suggestions, based on what is known so far. We have several hypotheses about what it looked like and what it ate.
9PALEONTOLOGISTA scientist who studies prehistoric life.A paleontologist’s tools include hammers, brushes and chisels.
10SPECIMENS Samples taken for scientific study. They gathered specimens of dinosaurs.
11Scientists have many theories about the disappearance of dinosaurs. THEORYA widely held scientific explanation that is based on evidence but cannot be stated as fact.Scientists have many theories about the disappearance of dinosaurs.