Understand that water can turn into invisible gas (evaporation) and turn back into liquid when touching a cold surface (condensation).
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Hook about water turning invisible.
Definition and examples of evaporation.
Have you ever wondered where water goes when a puddle dries up? The process of conversion of water into its vapour state is called evaporation.
This water gets converted into a gaseous state called water vapour, which mixes into the air around us.
Image of steam from a hot pan.
Water vapour is actually invisible, but tiny droplets of water formed in the steam make it visible.
Definition and examples of condensation.
When water vapour present in the air comes in contact with a cold surface, it forms water droplets.
The process of conversion of water vapour into its liquid state is called condensation.
Diagram of water condensing on a cold glass.
The extra water collected outside the tumbler is formed by the condensation of water vapour present in the surrounding air.
Fill in the blanks to test definitions.
Water changes its state depending on the temperature around it. The process of conversion of water into its vapour state is called . This natural process takes place continuously, even at room temperature. On the other hand, the process of conversion of water vapour back into its liquid state is called . This reverse process happens when invisible water vapour in the air touches a surface, like the outside of an icy glass.