
Fog Formation in a Bottle
Easy
Can you make a cloud form inside a bottle? Fog is just a cloud that sits near the ground. It appears when warm moist air meets something cold.
You fill one bottle halfway with very hot water. Then you pour out most of the water and place an ice cube in the mouth of the bottle. You do the same with a bottle of cold water for comparison.
Watch what happens inside each bottle. The warm bottle should fill with a small fog cloud while the cold one stays clear.
Hypothesis
The hypothesis is that fog forms when warm, moist air is cooled quickly.
Method & Materials
You will fill one bottle with hot water and the other with cold water, pour out the hot water, and then place an ice cube in the mouth of each bottle.
You will need two bottles, hot and cold water, and an ice cube.
Results
After the experiment, you will observe that the warm, moist air in the bottle with hot water is cooled quickly and forms fog. The fog is denser in the bottle with hot water than in the bottle with cold water.
Why do this project?
This science project is so interesting and unique because it allows you to observe the formation of fog in a controlled environment.
Also Consider
Experiment variations to consider include using different temperatures of water and different sizes of ice cubes.
Full project details
Additional information and source material for this project are available below.Related video
These videos explain the science behind this project and demonstrate key concepts used in the experiment.
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