Question

On heating 3 teaspoons of soil in a boiling tube we see water condenses on its upper cooler parts. Why does this happen?

Answer 1

Answer: Because of moisture present in the soil.

Explanation:

Answer 2

On heating, water in the soil evaporates, moves up and condenses on the cooler inner walls of the upper part of the boiling tube. On a hot summer day, the vapour coming out of the soil reflect the sunlight and the air above the soil seems to shimmer. After heating the soil, take it out of the tube.