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User guide
Teachers’ Guide
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Substances
A1 Melting/Freezing
B1 The particle theory
C1 The gas state
D1 The three states
E1 Density
Mixtures
F1 Melting behaviour
G1 Evaporation of water
H1 Condensation of water
I1 Recognising dissolving
J1 Solubility
K1 Separating mixtures
Changing substances
L1 Structures
M1 Chemical change
Advanced substances
N1 Crystals
O1 Change of state
P1 Gas and pressure
Advanced mixtures
Q1 Diffusion
R1 Rate of evaporation
S1 Rate of dissolving
T1 Chromatography
Advanced changes
U1 Formulae
V1 Fire
W1 Acids
N2.3 CRYSTALS ON FREEZING: ICE
LINKS
The video shows what happens when a cup of water is left in the freezer for several hours.
Where would you expect ice crystals to form first?
What would you expect to see if we broke open the contents
before they were completely frozen?
What would you see if you allowed it to freeze
completely
before you broke up the ice?
Notes: see Teachers’ Guide
Watch the video to check your predictions
teachers’ guide n2
more info
n1: crystals 1
n2: crystals 2
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a Science Enhancement Programme CD-ROM 2005
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