Change of state
What is the boiling point of water?
100°C
Give one example of melting in everyday life
What was our control today?
Size of ice cubes, amount of substance added, room temperature, type of containor
What is the melting point of ice?
0°C
What happens to water when it reaches 100°C?
What was the independent variable?
Type of substance (salt, sugar, water)
..... is the changing of state from a solid straight to a gas
Sublimination
Why do we put salt on the roads in winter?
It lowers the freezing point of water, causing ice to melt and preventing it from reforming
What was the dependent variable?
How fast the ice melted / time taken
What happens to temperature during melting?
It stays the same
Which substance melted ice fastest?
Salt
Why did salt melt ice fastest?
It lowered the melting/freezing point