Overview

Biological Evolution: Unity and Diversity supports Grade 6 Science learning aligned to NGSS through 6 ready-to-use worksheets. Students investigate how evidence from trees, ecosystems, fossils, and variation helps explain change over time. Across these activities, learners build explanations that connect patterns in biodiversity and population dynamics to mechanisms such as natural selection, adaptation, and speciation. This lesson bundle keeps the focus on NGSS Disciplinary Core Ideas and Science and Engineering Practices while offering structured notes and evidence-based prompts for consistent classroom routines.

Worksheets included: 6

What's Included

• ✅ Grade 6 Tree Evidence in Science Worksheet | NGSS Science Activity & Notes – Students analyze tree-related evidence to support claims about relationships and patterns.
• ✅ Grade 6 Population Dynamics in Science Worksheet | NGSS Ecology Activity – Learners interpret population changes and connect them to environmental conditions.
• ✅ Grade 6 Natural Selection Worksheet | NGSS Evolution Science Activity – Students model how traits that improve survival become more common over generations.
• ✅ Grade 6 Fossil Patterns in Earth's History Worksheet | NGSS Science Activity – Students read fossil pattern information to infer how life has changed through time.
• ✅ Grade 6 Biodiversity Patterns in Island Ecosystems Worksheet | NGSS – Students compare island ecosystem data to explain biodiversity patterns and related causes.
• ✅ Grade 6 Adaptation and Speciation Worksheet | NGSS Science Activity – Students use evidence to explain how adaptations can contribute to speciation.

Skills & Standards

Within the NGSS framework, this unit bundle emphasizes the crosscutting ideas of systems, patterns, and cause-and-effect relationships. Students practice disciplinary core ideas from biological evolution and ecology by using evidence to describe how environments influence survival, reproduction, and species change. The activities support modeling and analytical reasoning as learners interpret provided data (such as trait or population trends) and connect those patterns to mechanisms like natural selection and adaptation. Students also strengthen evidence-based explanations by citing worksheet observations and turning them into clear written responses that follow claim–evidence–reasoning structures.

Perfect For

• Teachers seeking structured instruction
• Sub plans
• Homework or review
• Intervention or centers
• Assessment preparation

How to Use

Plan for about 1–3 weeks for this single unit, depending on how you group students and whether you extend writing and discussion. Try a short warm-up before each worksheet using a single prompt (for example, “What evidence would change your mind about how populations shift?”). Follow with guided practice where you model how to turn data into a claim supported by evidence from the specific activity. Close each session with an exit ticket that asks students to identify one pattern and explain one cause-and-effect link tied to Biological Evolution, then use end-of-unit review questions to revisit misconceptions.

Closing

Use these worksheets to help students produce strong, evidence-based explanations of Biological Evolution across changing environments.