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Plant Transpiration – Plants Sweat Too!
Computers & Internet, Science
6, 7, 8
Title – Plant Transpiration – Plants Sweat Too!
By – Erik Hanchett
Primary Subject – Science
Secondary Subjects – Computers & Internet
Grade Level – 6-8
Students will identify the factors and processes of plant transpiration in context of the water cycle.
- Students will be divided into teams.
- Each team is given a plastic sandwich bag and some string.
- Students proceed outside to search the campus for various types of trees and shrubs.
- Next, students put the baggie around a small branch with leaves and tie the string around the branch tightly so water vapor cannot escape.
- Now the students record observations and collect plant type and location data. If several trials can be done, the observations will be more accurate.
- After a day or two, students return to the plants and collect the baggies with water inside from transpiration.
- Then in the lab, students can measure the amount of water each plant produced .
- Students can weigh the leaves of the plant that were inside the baggie.
- Now they can calculate how many milliliters of water was produced per gram of leaf material.
- Students will also complete the online virtual lab (link below) that tests various factors of plant transpiration (if available).
- Students write down data on a spreadsheet that is then automatically graphed.
- Students also write down answers to questions in the electronic journal that is then emailed to the instructor.
- Students also conduct a sister outdoor lab capturing water from trees and bushes around campus.
Virtual Lab Link:
- Outdoor lab data and graph
- Program graph and journal
E-Mail Erik Hanchett !