Here is how it happened:
You will need
clean dry paper clips
tissue paper
a bowl of water
pencil with eraser
tissue paper
a bowl of water
pencil with eraser
What to do
Fill the beaker with water
Try to make the paper clip float…not much luck, huh?
Tear a piece of tissue paper about half the size of a CARR card
GENTLY drop the tissue flat onto the surface of the water
GENTLY place a dry paper clip flat onto the tissue (try not to touch the water or the tissue)
Use the eraser end of the pencil to carefully poke the tissue (not the paper clip) until the tissue sinks. With some luck, the tissue will sink and leave the paper clip floating!
Try to make the paper clip float…not much luck, huh?
Tear a piece of tissue paper about half the size of a CARR card
GENTLY drop the tissue flat onto the surface of the water
GENTLY place a dry paper clip flat onto the tissue (try not to touch the water or the tissue)
Use the eraser end of the pencil to carefully poke the tissue (not the paper clip) until the tissue sinks. With some luck, the tissue will sink and leave the paper clip floating!
How does it work?
How is this possible? With a little thing we scientists call SURFACE TENSION. Basically, it means that there is a sort of skin on the surface of the water where the water molecules hold on tight together. If the conditions are right, they can hold tight enough to support your paper clip. The paperclip is not truly floating, it is being held up by the surface tension. Many insects, such as water striders, use this “skin” to walk across the surface of a stream.
MAKE IT AN EXPERIMENT
When you put the tissue under the paper clip it creates a thin skin called surface tension all the water molecules hold on tightly and is they hold tight enough it will be able to hold up your paper clip that allows it to look like it's floating. some tiny insect can walk across the water because of the thin skin on the water.
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