schoolscienceproject.blogspot.in
Rain in a jar
Place a green
twig in a glass of water in sunlight. Pour a layer of oil on to the surface of
the water and invert a large jar over the lot. After a short time, drops of
water collect on the walls of the jar. Since the oil is impermeable, the water
must come from the leaves. In fact the water which the plant absorbs is given
off into the air through tiny pores in the epidermis of the leaf. Air saturated
with moisture and warmed by the sun deposits drops like fine rain on the cool
glass.
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