S
AR E
W NO
FL
AK
MED AND WHY ARE FOR T H ES E
YN E V E R
TH
HO W
ES AM E?
H ow a re s n ow f l a ke s fo r m e d a n d
1
A Water D freezes
PARTIC
(H2O)
WATER MOLECULES
2 Hydrogen Atoms are bonded to one Oxygen Atom
d why a re t h ey n eve r t h e s a m e ?
Droplet o n t o Pollen
CLE
D us t o r
In the
Air
SUPER COOLED WATER is water that has remained unfrozen at temperatures below freezing
H ow a re s n ow f l a ke s fo r m e d a n d
2
More Water
join wi
Frozen Dus
Water molecules align themselves in a
CRYSTALLINE ARRANGEMENT
Particl
d why a re t h ey n eve r t h e s a m e ?
r molecules
er
s m to
t
we a
k
Atoms join n e to g y o fo r m a x
le
O
st/Pollen
2
mo
A
th the
Hy e r nd o b
droge
c a l le d
a
n
H ow a re s n ow f l a ke s fo r m e d a n d
This
3The Crys
HONEYCOMB Structure gives snowflakes their 6-fold symmetry
Arrang Of The Water
Particle
Basic Sh
Snow
d why a re t h ey n eve r t h e s a m e ?
stalline
gement
es forms the
hape of
Flakes
3 Hydrogen Bonds form a
BUCKLED HONEYCOMB The Forth Bond Layer. The last bond
connects to a layer above or below
H ow a re s n ow f l a ke s fo r m e d a n d
4
The Shap Snowflake
be altered by Lo
When there are less
water molecules in the air, the
molecules tend to attach to the
rougher spots of the snowflakes surface creating the Smooth Plates
seen in
Facets
Which
d why a re t h ey n eve r t h e s a m e ?
FACETS
pe of
s can then
ower Humidity
c a u s e s Facets to form
are straight adges that build up in a hexagonal arrangement
H ow a re s n ow f l a ke s fo r m e d a n d
Branching is an
INSTABILITY
5
Once branches start to form they can grow quite quickly. Small bumps develop into large branches and bumbps on the branches become side branches.
hIGHER h also affe formation of
Causing branch
to form
d why a re t h ey n eve r t h e s a m e ? When there are excess water
molecules around, they tend to attach themselves to the most
prominent parts of the structure like the corners.
hUMIDITY ects the snowflakes
hing patterns
When this happens more and more will connect to these parts making them stick out even more
H ow a re s n ow f l a ke s fo r m e d a n d
6
A snowflakes pattern by other contrib
MELTING
COLLI
on the way to the ground
with other or stru
This can lead to sno asymmetric
d why a re t h ey n eve r t h e s a m e ?
n can also be affected buting factors...
IDING
COMBINING
snowflakes uctures
with fellow snowflakes
owflakes having an cal pattern
H ow a re s n ow f l a ke s fo r m e d a n d
NEEDLES
7
COLUMNS
Snowflak classified basic pa
d why a re t h ey n eve r t h e s a m e ? DENDRITES
kes can be d into six atterns STARS
PLATES WITH COLUMNS
PLATES
Lucy Dornan & Hayleigh Stanistreet