Topic: Does Ice Float?
Solid
• Fixed shape and volume
• Molecules very close together & barely
moving
Liquid
• Definite volume, no definite shape
• Molecules spread apart & moving
moderately
Gas
• No definite volume, no definite shape
• Molecules widely spread out & moving fast
Which phase is the most dense?
Gas
Solid
Liquid
Does ice float in water?
Most materials are densest when they are
solid.
Water is the exception, it is densest as a
liquid.
It is all in the structure…
ESRT pg 1 – Properties of Water
Water is densest at 3.98°C = 1.00 g/ml
Which is more dense?
Oil
Corn Syrup
Alcohol
Water
0.85 g/ml
1.20 g/ml
0.789g/ml
1.0 g/ml
Facts..
• more dense objects tend to sink
• less dense objects tend to float
Water
Ice
Final Question
How would the world be different if ice
was denser than liquid water?
http://www.youtube.com/watch?v=ypNpDEsTg4g