a deep narrow valley
Ravine
a scientist who studies organisms that lived on the past
Paleontologist
A rock made from sediment left by the action of water, ice, or wind.
Sedimentary rock
A level of material
Layer
A reptile that became extinct, some of which are large.
dinosaurs
Soft grey and black powder that is left after a substance has burnt
Ash
The bones of the head that give the head its shape
Skull
to observe something in detail in oder to discover something about it.
Examine
An activity that is done for enjoyment
Pastime
to remove soil
excavate