Differentiate between solid, liquid, and gaseous water based on shape, flow, and spreading behavior, and understand melting/freezing.
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Flowchart showing state changes.
Heating and cooling drive the transitions between the three states of matter.
Explanation of the three states of water.
In its solid state, water exists as ice. A solid retains its shape irrespective of the container it is placed in. It does not flow or spread. Other everyday substances that exist as solids include wood, stone, and glass.
Explanation of melting, freezing, heating, and cooling.
Water and other substances change their states upon heating or cooling. The process of conversion of a solid into a liquid state is called melting. This requires heat. For example, leaving ice out at room temperature causes it to melt into water. Similarly, a solid candle made of wax melts into liquid wax when the wick is lit.
Matching exercise for phase changes.
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