Unit 4 Story 3 By Mrs. Nailon Dinosaur Fossils Unit 4 Story 3 By Mrs. Nailon

Fossils Hardened remains of an animal or a plant that lived long ago. We have learned all we know about dinosaurs from their fossils.

Hardened Become solid Some fossils are hardened tracks or footprints left behind by a moving animal.

Scientists People who study things in nature A scientist is someone who studies things in nature.

Difficult Not easy Hard Antonym; easy Putting dinosaur bones together to make a skeleton can be difficult.

Extinct no longer living Antonym; alive Scientists must learn about dinosaurs from fossils because dinosaurs are extinct.

Paleontologist A scientist who studies fossils A scientist who studies fossils is called a paleontologist.

Chance to find by luck Possibility Sometimes fossils are found by chance.