OD 4 Unit 4 Get Ready

very large animals that became extinct (= disappeared from the earth) millions of years ago

• dinosaur

• ravine

• ash

• pastime

the bone structure of a human or animal head

• ash

• skull

• examine

• layers

something that you enjoy doing when you are not working

• ash

• layers

• pastime

• excavate

formed from the sand, stones, mud, etc. that settle at the bottom of lakes, etc.

• excavate

• sedimentary

• examine

• discover

to dig in the ground to look for old objects

• examine

• layers

• ravine

• excavate

to find or learn sth that nobody had found or knew before

• sedimentary

• pastime

• layers

• discover

a sheet, the material, usually one of several, covering a surface or body.

• layer

• ravine

• examine

• skull

a person who studies fossils

• examine

• excavate

• paleontologist

• pastime

the grey or black powder which is left after sth has burned

• dinosaur

• discover

• skull

• ash

a narrow deep valley with steep sides

• ash

• discover

• ravine

• examine