Air movement in injection bottle in Air, Winds And Cyclones – Class 7 Science Experiment
Chapter Name: Air, Winds And Cyclones
Activity Name: Air movement in injection bottle in Air, Winds And Cyclones
Activity Description:
The experiment explores air movement and temperature effects on a water drop placed inside an injection bottle with a ballpoint refill inserted in its cork. By warming the bottle and then placing it in cold water, the behavior of the water drop is observed.
Required Items:
- Empty injection bottle
- Empty ballpoint refill
- Cork to fit the injection bottle
- Water
Step by Step Procedure:
- Remove the pin from the ballpoint refill.
- Insert one end of the refill into the cork of the injection bottle, creating an airtight seal.
- Place a small water drop on the upper end of the ballpoint refill.
- Rub your hands together to warm them up.
- Hold the injection bottle in both hands to warm it as well.
- Observe what happens to the water drop on the refill.
Experiment Observations:
- When the bottle and the refill are warmed, the water drop may move or show some changes in behavior.
- Place the warmed injection bottle in a saucer of cold water.
- Observe what happens to the water drop on the refill when it comes in contact with the cold surface.
Precautions:
- Be cautious while handling the injection bottle and the ballpoint refill.
- Do not touch the water drop during the experiment to avoid interference with the results.
Lesson Learnt from Experiment:
The experiment demonstrates the impact of temperature on air movement inside the injection bottle. When the bottle is warmed, the air inside expands, leading to a change in pressure, which may affect the behavior of the water drop.
Placing the warmed bottle in cold water causes the air inside to contract, potentially leading to a different behavior of the water drop. This experiment helps students understand the relationship between temperature, air pressure, and air movement.
