Encourage students to arrange other settings for the plant and to observe what happens. Build a terrarium for your classroom. Look for condensation on the glass or plastic walls and top of the terrarium. Put some non-galvanized nails inside the terrarium on a piece of wood or cardboard and leave some nails next to the terrarium. The inside of the bag may appear to be cloudy due to the water in the air.
Plants absorb water from the soil through their roots.
Additionally, plants produce a certain amount of water in their metabolic processes.