Green-Up / Green-Down


Students will use a GLOBE Plant Color Guide to monitor the change in color of selected leaves of trees, shrubs or grasses.
Students will monitor the budburst and growth of leaves of selected trees, shrubs or grasses.

Field Guides

Step-by-step instructions for collection data according to the protocols.

Data Sheets

Sheets to be filled out during data collection

Learning Activities

Activities to help students learn more about the instruments and protocols
Students learn about plant response to light by setting up simple investigations in the classroom.
Students learn what to look for during budburst by observing variations in timing and appearance of leaves of different local plant species.
Students learn about the timing of spring budburst, develop multiple working hypotheses about why timing differs year to year, and test hypotheses using environmental data collected by GLOBE students in Alaska to come to a conclusion about the factors that most impact timing of budburst on paper birch trees. **This activity has an option to get students analyzing data in spreadsheets. The spreadsheet file (and answer key) can be found here:
Students observe and classify local plants based on their patterns of change other than growth.
Students will analyze visualizations and graphs that show the annual cycle of plant growth and decline.
Students participate in a preparatory activity that will help them identify green-up progression in their local plants and this activity also introduces the idea of spatial scale related to plant observations.
Students learn about plant pigmentation and photosynthesis while conducting simple investigations to demonstrate the presence of pigments other than chlorophyll in leaves.