Time frame: one week
Space needed: sunny window sill
Objective: To observe the effect of air, water and light on plant health
Materials needed: four small green bean plants in pots
four popsicle
black paper
petroleum jelly
water
Estimated cost: $5.00
Introduction:
Plants require air, water and light to grow. If they don't get any one of these, they can die!
Methodology:
Mark popsicle stick with a #1, #2, #3 and #4, and stick one in each pot. Place plants in a sunny location.
Spread petroleum jelly thcikly on all stems and leaves (top and bottom) of Plant #1.
Cover the leaves of Plant #2 by pinning black paper covers over the leaves.
Water all plants except Plant #4 when the soil feels dry.
Compare the plants after 1 week.
Plant Treatment Lacking Describe how they look
#1 petroleum jelly air ______________________
______________________
#2 leaves covered light ______________________
______________________
#3 air, water, light nothing ______________________
______________________
#4 not watered water ______________________
______________________
Which plant looks healthiest? ___________________________________
What does this tell you about plant needs? ______________________
_________________________________________________________________