This will show you which side of the plant leaf takes in gases.
Things Required:
Potted plant
Vaseline
Directions:
Coat the top of four leaves with a heavy layer of Vaseline. Coat the underside of four leaves with a heavy layer of Vaseline. Observe the leaves daily for one week.
Is there any difference in the two sets of leaves?
This Is What Happens:
The leaves that had Vaseline coated on the underside died. The other leaves remained unchanged.
Science Behind It:
Openings on the underside of plant leaves called stomata allow gases to move into and out of the leaves. The Vaseline plugged the openings and the leaf was not able to receive necessary carbon dioxide or eliminate excess oxygen.
