Dinosaur FossilsDinosaur Fossilspages 14-31pages 14-31

Vocabulary Vocabulary

di no saurs

We have learned all that we know about dinosaurs from their fossils.

dinosaurs

Dinosaur bones show us that there were dinosaurs of all shapes and sizes.

dinosaurs

Dinosaurs are extinct animals that lived long ago.

fos sils

In the museum I saw some unusual fossils, including animal bones that had turned to stone.

fossils

Fossils can be leaves, shells, eggs, or skeletons.

fossils

Fossils are hardened remains of an animal or plant that lived long ago.

hard ened

After a while, the melted wax on the burned candle hardened.

hardened

Some fossils are hardened tracks or footprints left by a moving animal.

hardened

Hardened means became solid or hard.

sci en tists

Some scientists, people who study things in nature, dig for fossils.

scientists

Most often, scientists who study fossils have to spend a long time looking for them.

scientists

Scientists are people who study things in nature.

dif fi cult

We had a difficult time solving the word problem. It was not easy.

difficult

Putting the bones together is difficult when some of the pieces are missing.

difficult

Difficult means not easy.

ex tinct

extinct

Dinosaurs are extinct.They no longer exist.

extinct

Scientists must learn about dinosaurs from fossils because dinosaurs are extinct.

Extinct means no longer existing. There are no more of this kind of animal alive today.