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In this lab, learners grow broad bean (also called fava bean) plants in three EarthBoxes for a few weeks before exposing one to wind (using a fan), another to heat (using a lamp), and the third to nothing (the control). The experiment investigates how different conditions affect the rate of transpiration, defined as the loss of water through the small openings of the plant leaves called stomata. It takes around 17 days to grow the plants, and the experiment itself requires 4-5 days. Included worksheets ask learners to make predictions, collect and graph data, draw their observations, and analyze their data. [Activity is publicly available through a web crawler capture on Archive.org.]
- 1 to 4 weeks
- 1 to 7 days
- Over $20 per group of students
- Ages 14 - 18
- Activity, Experiment/Lab Activity
- English
Quick Guide
Materials List (per group of students)
- Three EarthBox kits
- Empty 1-gallon milk container and measuring cup or other graduated measuring device for watering EarthBoxes
- Small electric fan
- Microscopes, slides, and cover slips
- Three packets of broad bean seeds (minimum 96 seeds)
- Window ledge with 6-8 hours of Eastern or Southern exposure (two grow lights may be substituted)
- Heat lamp (or halogen light)
Subjects
-
Life Sciences
-
Diversity of Life
- Plants
-
Diversity of Life
-
Mathematics
-
Data Analysis and Probability
- Data Analysis
- Data Collection
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Data Analysis and Probability
-
The Nature of Science
-
The Scientific Process
- Conducting Investigations
- Gathering Data
- Formulating Explanations
-
The Scientific Process
Informal Categories
- Gardening
Audience
To use this activity, learners need to:
- see
- see color
- read
- touch
Learning styles supported:
- Involves hands-on or lab activities
Other
Includes alignment to state and/or national standards:
Access Rights:
- Free access
By:
Source Collection
- Science After School Consumer's Guide
Rights:
- All rights reserved, EarthBox,