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Moisture within the soil is absorbed by plant roots and released into the air through transpiration. Water also evaporates directly from the soil. This water vapor rises, hits the cool glass walls of the container, condenses into liquid droplets, and rains back down into the soil. The Carbon and Oxygen Cycle

If no condensation forms at all over a 48-hour period, open the jar, add 1 to 2 tablespoons of distilled water via a spray bottle, and seal it back up. Light and Location

Once you master the basic bottle biosphere, try these variations:

: Use a stick or dowel to create holes and carefully tuck the plant roots into the soil.