These are the most frequently used words in this book.
above
across
air
along
altiplano
america
andes
another
away
beneath
between
bolivia
bolivian
called
chapter
clear
come
cordillera
crust
deep
down
during
earth
earthquakes
eastern
enough
even
fact
far
farther
fault
few
field
first
floor
flow
forces
found
geological
geologists
great
helium
high
hot
however
hundred
idea
kilometers
lake
landscape
large
layers
level
line
long
lowlands
mantle
may
meters
million
mountains
movements
must
new
now
ocean
part
place
plates
problem
ranges
region
rise
rivers
road
rock
roots
sea
see
seemed
side
small
south
squeezing
still
surface
temperature
ten
though
time
two
valley
volcanic
volcanoes
water
western
work
world
years
zone