This experiment will show you how much water is transpired through the leaves of plants. Try this with a few different plants to see if the results are different.
Many plants take water in through their roots and pass it out through their leaves through tiny holes called stomata
Tie a clear, clean plastic bag firmly around some leaves on a bush, taking care not to harm it. Make sure the bag has no holes in it.
Check the bag daily to see what happens. Are all bushes the same?