These are the most frequently used words in another edition of this book.
across
almost
along
ancient
animals
another
arthropods
away
between
called
cambrian
change
cliffs
continents
day
different
earlier
early
end
even
evolutionary
example
eyes
fact
few
find
first
fossils
found
geological
glabella
great
head
history
hundred
itself
kind
know
known
large
legs
lenses
life
light
limbs
little
living
long
look
may
might
million
must
name
new
now
number
often
old
once
ordovician
own
part
place
pygidium
rather
relatives
right
rocks
science
scientific
sea
see
seem
segments
several
shale
shells
side
small
something
species
specimens
spines
still
strata
surface
thing
thoracic
time
tiny
together
trilobites
two
upon
whole
work
world
years
yet