about states of matter and their changes
The three states of matter
distinguish for water and other substances three different states:
Solid, liquid and gaseous states.
- In the solid state there are
glaciers, sea ices, hail and snow ( composed of tiny ice crystals ).
- In the liquid state there are rivers, seas, oceans, rain,
and also clouds and fogs (composed of tiny water droplets ).
- In the gaseous state there is water vapor always invisible to the
Water can change its state if temperature varies and under the action
of Sun and wind.
changes of state
- Melting (or fusion): transition from solid to liquid state.
- Vaporization: transition from liquid to gaseous state.
- Liquefaction (or condensation): transition from gaseous to liquid
- Solidification ( or freezing ): transition from liquid to solid state.
- Sublimation: transition from solid to gaseous state.
- Deposition: transition from gaseous to solid state.
The vaporization of a liquid may be gradual and natural (such as when
exposed to sunlight ). We then say that there is " evaporation ". It
can also be obtained by a rapid temperature rise which causes the
formation of gas bubbles: this is called " boiling ".
about states of matter and changes of state
The three states and their properties at molecular scale ( with
animations to explain the molecules move in solids, liquids and gases )
- : A game which
purpose is to shows differences between solid state and liquid state.
- : a flash game
about changes of state
- : A
worksheet for kids where blank must be filled with changes of state (
evaporates, freeze, boils ...)
- : a three
pages worksheet about three states, changes of states, energy and
- : a pdf
document that provide various activities like card game about solids,
liquids and gases, or a game board.
- : a flash game
in arctic about water and changes of state.
Various experiments explained with videos