Science Project “Hanging Water” Complete School Projects on Air, Water, Weather and Temperature for Class 8, 9, 10 and 12 Students.

Hanging Water

Materials Required:

1. A paper or plastic cup
2. A sheet of paper
3. A sharp pencil

A well-known experiment can be switched around.

The known experiment involves placing a sheet of paper over a glass, which is half-full of water. Then, a palm is placed on top of the sheet of paper. The glass is turned upside down. The palm is removed carefully. You will observe that air pressure keeps the water from spilling out because the sheet is tightly pressed against the rim of the glass. Water pours out of the glass, only at your bidding.

The take-off on this old experiment is a new one.

Make a hole near the bottom of a plastic or paper cup. Repeat the familiar experiment mentioned above, over a basin or outdoors.

Place your pointer finger on the hole to prevent air the from entering above the water and the paper will cling to the inverted glass.

You can announce that on the count of three, you can make the paper and the water to drop. Just remove your finger from the hole. A partial vacuum is created inside as long as the hole at the bottom of the glass remains covered. Outside air pressure keeps the sheet pressed to the rim of the glass.

Once the hole is uncovered, the vacuum disappears, allowing outside air pressure to enter the glass and force both the sheet and the water to drop.