Fossils and Dinosaurs

خلاصه :

Rocks can tell stories about the past. Scientists called paleontologists look at rocks. They use them to tell what plants and animals were like long ago. These rocks may be fossils. A fossil is a print of a plant or animal from long ago. Fossils can be footprints, parts of plants or animals, or old bones. This is a lizard fossil. The lizard lived long ago. The lizard died. It got covered with sand and mud. Many years went by. The sand and mud turned into rock. The print of the lizard got left in the rock. Fossils tell about plants and animals of the past. Some plants and animals do not live on Earth anymore. They are extinct. Fossils can tell about extinct plants and animals. Sometimes plants and animals stop getting what they need. Plants and animals die when this happens. Plants and animals may become extinct when habitats change. Dinosaurs were animals that lived a long time ago. Now dinosaurs are extinct. They do not live on Earth anymore. Some dinosaurs were big. Some dinosaurs were small. Some dinosaurs ate plants. Some dinosaurs ate other animals. This dinosaur was the size of a chicken. This dinosaur ate other dinosaurs. Some dinosaur bones have turned into fossils. Paleontologists look at these fossils. These fossils give clues about what dinosaurs looked like. Fossils show that a Stegosaurus had a large body. It had a small head and a small mouth. Paleontologists think this dinosaur ate plants.