You will need:
- A bowl or dish with
large surface area - Water
- Liquid soap
- Cutouts of fish (made
from cardboard) - Cotton swab
Work with the principles of surface tension and create your own swimming fish. Watch how your fish swims around in the water by following this simple experiment.
INSTRUCTIONS
- Take water in a large dish, which has a wide surface area.
- Take the cutouts of your fish and place them on the surface of the water. Since they are light, they will not sink immediately.
- Take your liquid soap and gently release a drop of the liquid soap just behind each fish’s tail.
- Alternatively, take the liquid
soap onto a cotton swab and
dip it gently just behind the
fish’s tail.
RESULT
Water molecules always cling
to one another creating a sort
of bulge. However, when they
come into contact with soap,
the surface tension of the molecules is broken and the molecules break away from one another, taking the fish with them.
