How to Make Your Own Weather Indicator

You must have seen weather reports on the T.V. where they tell us about the future weather predictions and about current weather. What if you can predict the weather by your own or tell about the current weather around your house or colony. Here is project to make your own weather indicator or forecaster.

Here is a project to make your own weather indicator. This project can be used as your class project or in the science fair of your school.

Materials required:

- Blotting paper (pink colored)
- Common salt or cobalt chloride (easily available in chemist store or get it from your school laboratory)
- Water
- Green colored paper
- Wire (any kind of wire)

Method/ Preparation:

Dissolve common salt or cobalt chloride in some water to make a saturated solution. Make a flower form out of a pink colored blotting paper. Cut the blotting paper into petal shaped pieces of varying sizes from small to bigger ones. Arrange them according to size keeping the smallest on the top and the biggest below them, with the help of a wire fix them up so that the wire acts as the stem of the flower. Fix a few green colored leaves to the stem in order to make it as real as possible.
Soak the pink blotting paper in saturated salt solution or cobalt chloride solution.
After drying your own weather forecaster is now ready to use.


The petals of this flower will change colors indicating impending weather. In fine weather the flower will be white with the dry salt crystals, but on a rainy day and damp weather, the flower petals will turn deep pink. If you have used cobalt chloride the flower will turn blue on a wet day.


- If you are using cobalt chloride in making this, then handle it with care(as this is a laboratory chemical), it may cause allergy in some cases so it is better to take the help of some elder.
- To be on the safer side use common salt in place of cobalt chloride.



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