The remains or traces of plants and animals that lived long ago
Fossils
A dead body, or the parts that are left
remains
When there are no more of a kind of animal – all of them are dead
Extinct
You can see a lot of these at the zoo
Animals
The long, pointed teeth of some animals like elephants
tusks
Members of your family – by blood or marriage
Relatives
the flat part of the body that a bird, insect, or bat uses for flying
wings
A hole in the ground where animals live
Burrow
The soft hair of an animal.
Fur
Humans and other animals that are warm-blooded, have hair, feed their young with milk, and have more well-developed brains
Mammals
Lightweight growths that cover a bird's body
Feathers
either or both of the two bones that frame the mouth and hold the teeth
Jaws
The back set of legs on an animal
Hind feet
Hard coverings that protect the toes of many animals, like toenails.
Hooves