### Measuring Trees

Measure the height, diameter, and circumference of trees in a forest. Count growth rings to determine the age of each tree. Grow the trees for several years and investigate how growth is affected by precipitation.

#### LEARNING OBJECTIVES:

• Measure the height, diameter, and circumference of a tree.
• Determine a tree's age by counting growth rings.
• Determine how precipitation affects the growth of a tree.
• Determine how growth changes as a tree ages. (Extension)

#### VOCABULARY:

• circumference, cross section, diameter, drought, growth ring, precipitation

### User Lesson Materials (2):

• EL Staff
##### Seat Work for Whole-Class Instruction plus "Tree Cookie" Activity

This is a customized student exploration sheet to be used as “seat work” when the Gizmo is presented for whole class instruction. Suggestion: Review the Gizmo’s Teacher Guide and original Student Exploration Sheet to determine which parts of the Gizmo lesson need to be modeled by the teacher.

• ##### Mini Assessment for Measuring Trees

This is a mini assessment to discover if the students have picked up various math and science skills from the Gizmo guide. It requries critical thinking skills for long answer responses.

### User Recommendations (4):

• ##### I would recommend this Gizmo to a teacher teaching measurement. This Gizmo allow students to grow trees for over several years.

Recommended For:  Middle School Life Science, Middle School Physical Science

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