Easy Nature Activities for Kids

By: the Editors of Publications International, Ltd.

Collect Water Vapor from Plants

Collect water vapor from plants to prove that they perspire. This means that plants' leaves give off water vapor. You can't see a plant perspiring, but this experiment shows you how it happens.

What You'll Need:

  • Potted plant
  • Plastic bag
  • Tape

Step 1: Tape a plastic bag tightly around one stem of a plant.


Step 2: Observe the bag each day for a week. Be sure to water the plant.

What happens? What do you think is the source of the moisture you see in the bag? It comes from the leaves through tiny pores on the undersides of the leaves.

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