WATER
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Transcript of WATER
Water is absorbed by
some materials.
Water beads up on
some material.
Q: Why does water make a
sponge expand?
Q: Does squeezing the dropper gently make the water
fall more slowly?
Q: Would water bead up more
easily (form better domes) on foil that
is not wrinkled?
Water forms a
dome on a flat surface.
Surface tension makes water form a sphere or a
dome.
Soap added to water reduces its
surface tension.
Q: Would the surface tension
be the same on a dime?
Q: What else could we add to water to change
its surface tension?
Water flows
DOWN a slope.
Bigger domes of water move down a slope
faster.
Water flows
faster down a steeper slope.
Q: How does water get clean?
Q: What stopped some of the water
drops from flowing down the
slopes?
Q: Can we speed up the flow by using another surface, like
glass?
Water
expands when
heated.
Water
contracts when cooled.