Create Your Own Fog

Type of Lesson: Hands-on Activity

Time Needed: 20 minutes

Standards Addressed

MEGOSE EAW2 Describe weather conditions and climates.
MEGOSE EAW6 Describe patterns of changing weather and how they are measured.
MEGOSE EAW10 Explain and predict general weather patterns and storms.

Quick Summary of Lesson

Students form fog in a jug. This lesson would be a great intro to looking more deeply at fog during a weather unit.


Glass jar
Wire mesh
Ice cubes
Hot water


1. Fill the jar halfway with hot water.
2. Place the wire mesh on top of the jar's mouth. Then place 3-4 ice cubes on top of the wire mesh.
3. After a few minutes, observe the fog that will form inside the jug.

Notes to the Teacher

The reason this activity works is this: the hot water evaporates into the jar. The ice cubes create a cool air mass at the top of the jar. This cool air causes the evaporated water to condense again, so that we see fog. Of course, the evaporated water does need condensation nuclei in order to condense (dust, aerosols, etc), but that's usually not lacking in a normal classroom!

Need More Information? Try Using Windows to the Universe

Please use these links for further ideas or more information:
Earth sky conditions
Earth's weather
Weather crossword puzzle

Last modified prior to September, 2000 by the Windows Team

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