Melting and freezing
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
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A phase transition is the change of a substance from one state of matter to another.
What happens in a liquid during evaporation and boiling? What does its boiling point depend on?
Icebergs are blocks of frozen freshwater floating in the sea.
A solid substance formed at low temperatures on the ocean floors of Earth by the high pressure.
The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.
There are various types of instruments used for measuring temperature.
Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.
The last Ice Age ended about 13 thousand years ago.
This animation demonstrates how a refrigerator works.
This animation demonstrates the structure and operation of hair dryers.