From Continental Drift to Plate Tectonics: Using Historical Evidence to Teach the Nature of Science

This activity was designed for an introductory undergraduate physical geography course enrolling approximately 24 pre-service secondary education majors. However, it can be readily adapted for introductory courses in Earth science, environmental science, geology, or teacher preparation programs.
Students should have a basic understanding of Earth history, geologic time, and fundamental geologic processes prior to engaging in the activity. No prior knowledge of continental drift or plate tectonics is required.

The activity is designed to span three class sessions, though it can be modified for shorter or extended instructional formats depending on course needs.
Although originally developed for undergraduate instruction, the activity aligns well with high school Earth and Space Science standards and can be adapted for secondary classrooms. Its emphasis on evidence-based reasoning, scientific argumentation, and the evolving nature of scientific knowledge makes it particularly well suited for courses aligned with the Next Generation Science Standards (NGSS).

Class Size

• Small classes (10–30 students): Recommended implementation.
• Medium classes (30–75 students): Use larger discussion groups.
• Large lecture courses (75+ students): Adapt collaborative activities using online polling tools or learning assistants.

Time Required

Session 1: Historical Foundations and Prior Knowledge (90 minutes)

• Modified KWL (What students know; what they Wantto know; and what they Learned) assessment: 15 minutes
• Pangea reconstruction activity: 20 minutes
• Introductory lecture: 20 minutes
• Wegener evidence analysis: 20 minutes
• Reflection and discussion: 15 minutes

Session 2: Evidence and Conceptual Development (90 minutes)

• Evidence-based lecture: 30 minutes
• Guided discussion: 10 minutes
• Virtual museum exploration: 15 minutes
• Mantle Convection Modeling Activity: 15 minutes
• Jigsaw activity: 10 minutes
• Reflection: 10 minutes

Session 3: Synthesis and Nature of Science Reflection (90 minutes)

• Review activity: 20 minutes
• Class discussion: 20 minutes
• Summative KWL assessment: 30 minutes
• Reflection and debriefing: 20 minutes

Students should have a basic understanding of Earth history, geologic time, and fundamental geologic processes prior to engaging in the activity. No prior knowledge of continental drift or plate tectonics is required.

The activity is designed to span three class sessions, though it can be modified for shorter or extended instructional formats depending on course needs.
Although originally developed for undergraduate instruction, the activity aligns well with high school Earth and Space Science standards and can be adapted for secondary classrooms. Its emphasis on evidence-based reasoning, scientific argumentation, and the evolving nature of scientific knowledge makes it particularly well suited for courses aligned with the Next Generation Science Standards (NGSS).

Standards Alignment

Next Generation Science Standards (NGSS)

• This activity supports several performance expectations and crosscutting concepts within the Next Generation Science Standards (NGSS Lead States, 2013).

HS-ESS1-5

• Evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of crustal rocks.
• Students examine multiple lines of evidence originally used to support continental drift, including fossil distributions, geological continuity, paleoclimatic indicators, and continental fit. They then evaluate how subsequent discoveries contributed to the development of plate tectonic theory.

HS-ESS2-1

• **Develop a model to illustrate how Earth's internal and surface processes operate at different spatial and temporal scales to form continental and ocean.

HS-ESS2-3

• Students develop a model based on evidence of Earth's interior to describe the cycling of matter driven by thermal convection.
• Although the primary focus of this activity is the historical development of continental drift and plate tectonic theory, students examine how advances in geophysics, oceanography, and Earth system science contributed to modern explanations of continental movement. Through analysis of evidence such as seafloor spreading, magnetic striping, and global patterns of seismic activity, students explore the discoveries that led to the recognition of lithospheric plate motion and its relationship to processes occurring within Earth's interior.
• As students compare Wegener's original hypothesis with modern plate tectonic theory, they evaluate how new evidence provided a plausible mechanism for continental movement. This progression supports understanding of how convection-driven processes within Earth's mantle contribute to plate motion and the continual recycling of the lithosphere.
• Students construct and revise conceptual models linking mantle convection, plate motion, seafloor spreading, and subduction, directly addressing HS-ESS2-3. During the Mantle Convection Modeling Activity, students analyze diagrams and simulations of mantle processes and develop explanations of how thermal convection drives plate motion and associated geologic processes.

Nature of Science Connections

This activity explicitly addresses the following NGSS Nature of Science understandings:

• Scientific knowledge is based on empirical evidence.
• Scientific knowledge is open to revision in light of new evidence.
• Science is a human endeavor influenced by historical, cultural, and disciplinary contexts.
• Scientific theories are supported by multiple lines of evidence and may be refined as new discoveries emerge.

The historical development of continental drift and plate tectonic theory provides a powerful case study through which students examine how scientific knowledge is constructed, challenged, revised, and accepted within the scientific community.

Students will be able to:

1. Explain the theory of continental drift and the evidence originally proposed by Alfred Wegener.
2. Describe why continental drift was initially rejected by the scientific community.
3. Explain how plate tectonic theory emerged as a unifying framework in Earth science.
4. Analyze the geological, paleontological, and geophysical evidence supporting plate tectonics.
5. Describe the historical development of scientific explanations concerning continental movement.

Nature of Science Goals

Students will be able to:

1. Explain that scientific knowledge changes over time as new evidence becomes available.
2. Recognize scientific theories as explanatory frameworks rather than immutable facts.
3. Describe how scientific consensus develops through evidence evaluation and scientific debate.
4. Understand that scientific knowledge is provisional and subject to revision.

Geoscience Practices

Students will:

1. Analyze multiple forms of geological evidence.
2. Construct explanations based on evidence.
3. Evaluate competing scientific explanations.
4. Communicate scientific reasoning through discussion and written reflection.
5. Engage in spatial reasoning through continental reconstruction activities.
6. Construct and interpret a conceptual model linking mantle convection, plate motion, seafloor spreading, and subduction.

This three-session instructional activity uses the historical development of continental drift and plate tectonic theory as a context for teaching both geoscience concepts and the Nature of Science (NOS). Students investigate how scientific knowledge develops, changes, and becomes accepted through the evaluation of evidence.

Session 1: Historical Foundations and Prior Knowledge

Students begin by completing the "K" (Know) portion of a modified KWL chart designed to elicit prior knowledge and misconceptions about continental drift, plate tectonics, and scientific knowledge.

Students then participate in a Pangea reconstruction activity in which they attempt to assemble continental fragments using spatial evidence. Following the reconstruction activity, the instructor introduces historical explanations for continental configuration, including contraction theory and land bridge hypotheses.

Students examine Alfred Wegener's continental drift hypothesis through assigned readings and multimedia resources. Small-group discussions focus on evaluating Wegener's evidence and considering why many scientists rejected his ideas despite supporting observations.

Session 2: Evidence and Conceptual Development

• Opening discussion: fossil evidence in modern Arctic environments.
• Instructor-led presentation on fossil, paleoclimatic, glacial, geological, and geophysical evidence supporting continental drift.
• Guided discussion examining why evidence alone was insufficient for widespread acceptance of Wegener's hypothesis.
• Mantle Convection Modeling Activity:
  • Students examine diagrams, animations, or simulations illustrating mantle convection.
  • Students relate mantle convection to seafloor spreading, subduction, and lithospheric plate motion.
  • Students construct a simple explanatory model showing how heat transfer within Earth's interior contributes to the movement of tectonic plates.
  • Small-group discussion focuses on how the discovery of a plausible mechanism strengthened scientific acceptance of continental drift and contributed to the development of plate tectonic theory.
• Digital exploration using Google Arts & Culture (Gottesman Hall of Planet Earth) or similar Earth science resources.
• Collaborative worksheet completion and evidence analysis
• Jigsaw discussion of findings.
• Reflective writing on learning progress and remaining questions.

Session 3: Synthesis and Nature of Science Reflection

Students participate in a review activity before completing the "L" (Learned) portion of the modified KWL assessment. The session concludes with a structured discussion addressing:

• Why scientific theories change
• How scientific consensus develops
• Whether scientific revision weakens or strengthens confidence in science
• How the history of continental drift illustrates the Nature of Science (NOS)

Students reflect on how their understanding of both geoscience content and scientific knowledge evolved throughout the unit.

Instructor Materials (Microsoft Word 2007 (.docx) 24kB Jun16 26) 
Assessment Material (Microsoft Word 2007 (.docx) 22kB Jun16 26) 
Student Material (Microsoft Word 2007 (.docx) 30kB Jun16 26) 
Evidence of Effectiveness (Microsoft Word 2007 (.docx) 20kB Jun16 26) 
Pedagogical and Research Basis (Microsoft Word 2007 (.docx) 24kB Jun16 26)

Common Student Misconceptions

Students frequently:

• Believe continents move because oceans push them apart.
• Assume Wegener's theory was rejected because his evidence was weak.
• View scientific theories as fixed and unchanging.
• Believe scientific theories become laws after sufficient proof.

These misconceptions provide valuable opportunities for Nature of Science discussions.

Instructional Recommendations

• Avoid immediately correcting misconceptions. Instead, encourage students to compare competing explanations and evaluate available evidence.
• Emphasize that Wegener's evidence was often compelling, but that the absence of a plausible mechanism contributed to scientific skepticism.
• The transition from continental drift to plate tectonics provides an effective context for discussing how scientific knowledge changes over time.

Student Challenges

Students typically understand Wegener's observational evidence for continental drift more readily than the mechanisms that explain lithospheric plate movement. In particular, concepts such as mantle convection, seafloor spreading, and subduction often require additional instructional support because they involve processes that are not directly observable and operate over vast spatial and temporal scales.

To address this challenge, the Mantle Convection Modeling Activity was incorporated into the unit. This activity provides students with an opportunity to examine diagrams, simulations, and conceptual models that illustrate how thermal convection within Earth's mantle contributes to plate motion. By connecting historical evidence for continental drift with modern explanations of plate tectonics, the activity helps students develop a more integrated understanding of Earth's dynamic systems and the scientific advances that led to the acceptance of plate tectonic theory.

Accessibility and Universal Design for Learning Considerations

This activity incorporates principles of Universal Design for Learning (UDL) to support diverse learners and promote equitable participation. Instructional materials and learning experiences are designed to provide multiple means of engagement, representation, and expression, allowing students to access content and demonstrate learning in ways that align with their strengths and needs.

Multiple Means of Engagement

Students engage with content through a variety of instructional approaches, including inquiry-based learning, collaborative discussions, hands-on reconstruction activities, digital explorations, reflective writing, and whole-class discussions. These varied learning experiences provide multiple entry points for participation and help sustain student interest and motivation.

Students are encouraged to explore scientific questions, evaluate evidence, and construct explanations collaboratively, fostering active engagement and supporting learners with diverse backgrounds and experiences.

Multiple Means of Representation

Key concepts are presented through multiple formats, including:

• Instructor-led presentations and discussions.
• Visual representations of continental drift and plate tectonic processes.
• Geological maps, diagrams, and fossil distribution data.
• Videos, readings, and digital learning resources.
• Simulations and conceptual models, including the Mantle Convection Modeling Activity.

Presenting information through multiple modalities helps students develop conceptual understanding while supporting learners with different learning preferences and needs.

Multiple Means of Expression

Students demonstrate their understanding through a variety of assessment and communication formats, including:

• Written responses in the modified KWL assessment.
• Reflective writing assignments.
• Small-group and whole-class discussions.
• Collaborative problem-solving activities.
• Evidence-based explanations and conceptual models.

These opportunities allow students to communicate their understanding using different modes of expression while providing instructors with multiple sources of evidence regarding student learning.

Accessibility Considerations

To promote equitable access, instructors are encouraged to:

• Provide captions or transcripts for all video materials.
• Ensure digital resources are compatible with screen readers and other assistive technologies.
• Use high-contrast visuals and colorblind-friendly graphics when possible.
• Provide written and verbal instructions for all activities.
• Offer alternative formats for physical reconstruction activities when needed.
• Allow flexible participation options during discussions and collaborative work.
• Provide additional scaffolding and vocabulary support for multilingual learners and students with limited prior exposure to Earth science concepts.

These practices help ensure that all students have meaningful opportunities to engage with geoscience content, participate in scientific inquiry, and demonstrate their understanding of both Earth science concepts and the Nature of Science.

Student learning is assessed through a combination of formative and summative measures. The formative assessment includes classroom discussions, evidence-analysis activities, reflective writing assignments, and completion of the "K" portion of the modified KWL assessment. These activities help identify students' prior knowledge, misconceptions, and develop an understanding of continental drift, plate tectonics, and Nature of Science concepts.

Summative assessment is conducted through the "L" portion of the modified KWL assessment, in which students respond to open-ended questions addressing continental drift, plate tectonics, scientific evidence, and the Nature of Science. Responses are evaluated using a rubric that assesses conceptual understanding, use of evidence, historical reasoning, and understanding of scientific knowledge as an evolving process.

Additional evidence of student learning may be gathered through participation in the Pangea reconstruction activity, Mantle Convection Modeling Activity, collaborative discussions, and reflective writing assignments.

American Museum of Natural History. (2026). Guided exploration: Plate tectonics. https://www.amnh.org

Britannica. (n.d.). Continental drift. Encyclopedia Britannica. https://www.britannica.com

Hess, H. H. (1962). History of ocean basins. In A. E. J. Engel, H. L. James, & B. F. Leonard (Eds.), Petrologic studies: A volume in honor of A. F. Buddington (pp. 599–620). Geological Society of America.

Lederman, N. G. (2007). Nature of science: Past, present, and future.

Lederman, N. G., Abd-El-Khalick, F., Bell, R. L., & Schwartz, R. S. (2002). Views of Nature of  Science Questionnaire.

National Geographic Society. (2022). Earth science resources. https://www.nationalgeographic.org

National Research Council. (2012). A Framework for K–12 Science Education.

Ogle, D. (1986). K-W-L: A teaching model that develops active reading of expository text. The Reading Teacher, 39(6), 564–570.

Oreskes, N. (1999). The rejection of continental drift: Theory and method in American Earth science. Oxford University Press.
PBS LearningMedia. (2026). Earth and space science resources. https://www.pbslearningmedia.org

Roach, Q., & Rudge, D. W. (2026, June 16). Using the history of research on continental drift to promote learning of the nature of science. In the Trenches. National Association of Geoscience Teachers. https://nagt.org/nagt/publications/trenches/articles/312109.html

Vine, F. J., & Matthews, D. H. (1963). Magnetic anomalies over oceanic ridges. Nature, 199(4897), 947–949. https://doi.org/10.1038/199947a0

Wegener, A. (1966). The origin of continents and oceans (J. Biram, Trans.). Dover Publications. (Original work published 1915)

Wilson, J. T. (1965). A new class of faults and their bearing on continental drift. Nature, 207(4995), 343–347. https://doi.org/10.1038/207343a0