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