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In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper. Learners consider how plants release water, what different kinds of leaves have in common, and whether a particular leaf's top or bottom side releases more water.
- 4 to 24 hours
- 45 to 60 minutes
- $10 - $20 per group of students
- Ages 8 - 18
- Activity, Experiment/Lab Activity, Lesson/Lesson Plan
- English
Quick Guide
Materials List (per group of students)
- cobalt chloride crystals
- table salt
- water
- mixing bowl
- spoon
- white typing paper
- clothesline and clothespins
- scissors
- ziplock bags or other airtight containers
- pencils
- transparent tape
- plastic lids or containers
- Action Cards (page 5 and 6 of PDF)
- index cards
- watch
- hand lenses (optional)
- cobalt chloride paper (instead of making your own)
Subjects
-
Earth and Space Science
-
Earth Processes
- Weather and Climate
-
Earth Processes
-
Life Sciences
- Cells
-
Diversity of Life
- Plants
-
Evolution
- Evidence for Evolution
-
Physical Sciences
-
Chemistry
- Chemistry of Life
-
Chemistry
-
The Nature of Science
-
The Scientific Process
- Asking Questions
- Conducting Investigations
- Gathering Data
- Formulating Explanations
- Communicating Results
-
The Scientific Process
Informal Categories
- Nature and Environment
- Outdoor Activity
Audience
To use this activity, learners need to:
- see
- see color
- read
- be mobile
- touch
Learning styles supported:
- Involves teamwork and communication skills
- Involves hands-on or lab activities
Other
This resource is part of:
Access Rights:
- Free access
By:
Rights:
- All rights reserved, The Regents of the University of California, 1982