UNESCO resource kit - science and technology educa...

There are two parts ·to
each module
The
water cycle
. 'froJl\somep
u.cesand'appearlng'inothef
Water is constantlY '~isappeartt'S .
places. For exatnp\e. hang oulwashinS to dry.
disap.-..r when yOU
Water seems to Y'-
••••• ens or cars)·
!d windo'WS(of klu;"
• . a arfroJl\noWhereontoe into invisible
• Water seems to ppe rface it has changed reads out inte
. •d water disaPpears froJl\ -::. Th~ watef vapour SF
When hq\ll This is called evaportl .
water vapOUr. iI b\e
an the space ava a .
h
. ThIS
e Uquid water appears·
cold surface, sotn
•
When water vapour toue es a
is caned condensation.
What you should do:
dte-appear.
~at