Overview

Evolution & Common Ancestry comes to life in this Grade 6 Science NGSS lesson bundle, built for students to use evidence from trees, populations, fossils, and traits to explain change over time. This unit includes 6 ready-to-use worksheets aligned to NGSS expectations.

What's Included

• ✅ Tree Evidence Worksheet Grade 6 NGSS Evolution & Common Ancestry – Students analyze evidence used to build and interpret evolutionary trees.
• ✅ Population Dynamics Worksheet Grade 6 NGSS Science Activity with Answer Key – Students model how populations change when conditions and traits affect survival.
• ✅ Natural Selection Worksheet Grade 6 NGSS Evolution Activity & Answer Key – Students connect variation, selection pressures, and outcomes for individual organisms and populations.
• ✅ Fossil Patterns Worksheet Grade 6 NGSS Evolution & Fossil Evidence – Students interpret fossil evidence and identify patterns that support common ancestry.
• ✅ Biodiversity Patterns Worksheet | Grade 6 NGSS Science Activity – Students examine how biodiversity shifts across time and environments and explain what patterns reveal.
• ✅ Adaptation and Speciation Worksheet | NGSS Grade 6 Evolution Activity – Students explain how adaptations can lead to speciation and increasing diversity.

Skills & Standards

Within the NGSS framework, this Evolution & Common Ancestry lesson bundle supports core life science ideas about how evidence can be used to explain unity and diversity of living things. Students engage with LS4.A Evidence of Common Ancestry and Diversity by interpreting trees and fossil patterns, and they use LS4.B Natural Selection and LS4.C Adaptation when reasoning from population dynamics and trait outcomes to claims about why certain traits become more common. Throughout the unit, students practice crosscutting concepts such as patterns (similarity in lineages, trends in biodiversity), cause and effect (selection pressures changing survival and reproduction), and systems and system models (populations as interacting groups shaped by environmental factors).

Instructional emphasis focuses on evidence-based explanation: students make a claim about evolutionary relationships or population change, support it with data from the worksheet scenarios, and refine reasoning using structured questions. Students also build analytical skills, including reading and interpreting evidence, comparing multiple lines of support, identifying what patterns suggest about adaptation, and describing how reproductive isolation and environmental pressures can contribute to speciation.

Perfect For

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

How to Use

Plan for 1–3 weeks of multi-day instruction, using the worksheets in sequence to move from evidence (trees and fossils) to explanation (natural selection, population change) and then to broader outcomes (adaptation, speciation, and biodiversity). Try these classroom routines: use a brief warm-up where students identify the type of evidence shown (tree, fossil, or population data) before reading the prompt; run guided practice with the population dynamics scenario, pausing to have students predict outcomes and then verify with the worksheet questions; and close each day with exit tickets that ask students to write a short claim-evidence-reasoning statement grounded in the day’s data.

Closing

These six worksheets help students connect evidence to reasoning as they work through Evolution & Common Ancestry in NGSS.