The document discusses the surface tension of liquids. Surface tension allows insects like water striders to walk on water and causes water to form spherical droplets on surfaces like taro leaves. Surface tension decreases with increased temperature or impurities on the surface or dissolved in the liquid. Highly soluble substances increase surface tension while sparingly soluble substances decrease it.

3.  The force exerted by
the molecule on the
surface of a liquid are
attracted only towards
the sides and
downward that its
surface behave like an
elastic film.

7. Water is poured on a taro leafWater is poured on a taro leaf

8. Water strider walking on
water

9.  Presence of impurities either on the surface or
dissolved in it.
 Highly soluble substance increases the surface
tension.
 Sparingly soluble substance reduces the surface
tension.
 Surface tension of a liquid decreases with
increase in temperature.