Is the outermost layer of the atmosphere, extending to more than 700 km above the ground. Gases here are very rare field.
eight
energy
age
baby
base
beside
business
case
catch
caught
child
choose
circle
color
correct
difference
direction
dried
easily
edge
exactly
explain
famous
fell
figure
forest
fun
George
government
grass
grew
happy
history
information
larger
late
listen
lower
machine
maybe
measure
measure
middle
milk
minute
modern
month
mouth
natural
nearly
necessary
north
object
ocean
plane
present
product
rather
reach
record
seems
running
seven
sides
single
skin
smaller
soil
south
speak
speed
spring
square
star
store
straight
strange
street
subject
suppose
teacher
thousand
thus
Tom
travel
trip
trouble
unit
village
wall
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week
whose
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wish
women
wood
wrote
yellow
suddenly
summer
surface
system
themselves
third
town
tried
warm
weather
whether
wide
wild
winter
