What You Need
Black Pepper
Water
Dish Soap
A Bowl
What To Do
1. Pour water in a shallow bowl
2. Sprinkle ground pepper over the water
3. Dip your finger in the water to show that nothing happens
4. Then pour drop of dish soap on your finger and dip it into the center of the dish of water
5. The pepper will suddenly run to the side!
Black Pepper
Water
Dish Soap
A Bowl
What To Do
1. Pour water in a shallow bowl
2. Sprinkle ground pepper over the water
3. Dip your finger in the water to show that nothing happens
4. Then pour drop of dish soap on your finger and dip it into the center of the dish of water
5. The pepper will suddenly run to the side!
The
Science Behind It
Water molecules like to "stick" to one another.
There is a difference between a molecule at the surface and one inside,
however, which is known as surface tension. The inside molecules are being pulled in all directions at once while the molecules on top are only being pulled downward. Soap destroys waters high surface tension. The pepper can only float where the surface tension is strong and there isn't soap. When the soap is added the water "scoots" away
and simply carries the pepper along with it.
Science Behind It
Water molecules like to "stick" to one another.
There is a difference between a molecule at the surface and one inside,
however, which is known as surface tension. The inside molecules are being pulled in all directions at once while the molecules on top are only being pulled downward. Soap destroys waters high surface tension. The pepper can only float where the surface tension is strong and there isn't soap. When the soap is added the water "scoots" away
and simply carries the pepper along with it.
RSS Feed