cylinder diagram graduated
In this activity we will see water transpiring off of a plant
and explore its relationship with other weather conditions.
1. Select two or more lower branches on a tree outside. At least
one branch should be in full sun most of the day and another should
be in the shade. Tie a baggie around each branch, and secure with
a twist tie according to the diagram.
2. Once a day for a week, go to the tree and carefully remove
the bags. Do not spill the water while removing them.
3. Pour the collected water from one branch into a graduated cylinder
and mark the amount on a chart. Place a plug on the cylinder.
Repeat this step for each branch that is part of the activity.
4. Complete the rest of the information on the chart as well,
including time collected, temperature, amount of sun on the branch,
current weather, etc.
5. Repeat the observation and data recording once a day at the
same time each day for at least one week.
How much water was collected? From where did the water come? Which
branch produced the most water? Why? Does the amount of sun make
a difference? Was it cloudy on any of the days we collected water?
What happened when it was cloudy? If we wouldn't have collected
the water, where would it have gone? How is transpiration different
from evaporation? What happens to the water that is in the air?
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