Tree growth rings and dendrochronology give Grade 6 science students a way to investigate how trees record environmental change over time. This worksheet explores how annual radial growth, ring width, and ring density provide clues about past growing conditions, helping students connect tree growth patterns with climate, forest disturbances, and long-term forest health.

Using examples related to trees and forests, students discover how scientists interpret growth rings rather than treating them as simple markers of age. They examine how drought may be associated with narrower rings, how favorable growing conditions may produce wider growth, and how insect outbreaks and other disturbances can leave patterns in tree growth. These examples introduce the idea that natural evidence can reveal changes across many years, while also reminding students that ring patterns do not provide exact daily weather records.

Explore the Science Behind Tree Rings

The reading passage introduces dendrochronology, the scientific study of tree rings to investigate past environmental conditions. Students consider how scientists compare ring patterns from multiple trees to reconstruct information about past climate and events such as forest fires. They also explore how researchers use long-term growth records to investigate broader patterns in regional forest health.

This Grade 6 forest science resource builds connections between observable tree structures and scientific interpretation. Rather than memorizing vocabulary alone, students practise explaining what ring patterns may suggest and why comparing evidence from multiple trees can provide a more useful picture of environmental change.

Skills and Activities

• Multiple-choice questions: Identify what growth rings reveal, recognize factors affecting ring width, and apply the meaning of dendrochronology.
• True-or-false statements: Review annual radial growth, drought-related ring patterns, insect outbreaks, and the limitations of tree-ring evidence.
• Short-answer responses: Explain how rings indicate tree age, describe environmental influences on growth, and discuss the value of comparing trees.
• Labeled diagram activity: Examine a visual representation to support learning about tree growth rings.
• Categorization activity: Practise sorting information related to the lesson's concepts.
• Student notes: Record key ideas for later reference and review.

What's Included

• ✔️ Grade 6 Science worksheet on tree growth rings and environmental history
• ✔️ Informational reading passage about ring patterns and dendrochronology
• ✔️ Multiple-choice, true-or-false, short-answer, diagram, and categorization activities
• ✔️ Student Notes lines at the bottom of the worksheet
• ✔️ Separate Answer Key PDF
• ✔️ Teacher Guide in the Answer Key PDF, with learning objectives, teaching tips, discussion questions, and common mistakes

Ways to Use This Resource

Use this tree rings science worksheet during a Grade 6 unit on trees and forests, as independent classroom practice, for lesson review, or as a formative assessment of students' understanding. The reading passage introduces the core ideas before students apply them in questions and written explanations. The included Teacher Guide supports lesson preparation and helps teachers prompt discussion about how environmental conditions affect tree growth.

With its Alberta environmental context and emphasis on evidence-based reasoning, this resource connects forest science to a broader question: how can scientists learn about environmental conditions that occurred before modern measurements were available? Students practise interpreting natural evidence while recognizing both its value and its limitations.