Continental Drift and Plate Tectonics
Students analyze evidence for continental drift and the theory of plate tectonics.
Key Questions
- Explain what evidence suggests that the continents were once joined together.
- Analyze the key pieces of evidence supporting the theory of plate tectonics.
- Construct a timeline showing the movement of continents over geological time.
Common Core State Standards
About This Topic
Weathering and Erosion are the processes that wear down Earth's surface and reshape the landscape. Students learn to distinguish between weathering (the breaking down of rock) and erosion (the movement of that broken material). This topic aligns with MS-ESS2-1 and MS-ESS2-2, focusing on the cycling of Earth's materials.
Students explore physical weathering, like ice wedging, and chemical weathering, like acid rain. They also investigate the 'agents' of erosion, water, wind, ice, and gravity, and how they transport sediment to new locations. This unit helps students understand how features like the Grand Canyon or local riverbanks were formed over millions of years.
This topic comes alive when students can physically model the patterns of erosion using stream tables or participate in collaborative investigations that test how different variables affect the rate of change.
Active Learning Ideas
Inquiry Circle: Stream Table Trials
Students use trays of sand and water to simulate a river. They change the 'slope' of the tray or the 'speed' of the water to see how it affects the amount of sand eroded and where it is deposited.
Think-Pair-Share: Weathering vs. Erosion
The teacher shows a series of photos (a cracked sidewalk, a muddy river, a sand dune). Students must decide with a partner if the photo shows weathering, erosion, or both, and explain their reasoning.
Stations Rotation: Chemical vs. Physical
Stations include 'shaking sugar cubes' (physical) and 'vinegar on chalk' (chemical). Students observe the changes and discuss which real-world processes these activities represent.
Watch Out for These Misconceptions
Common MisconceptionStudents often use the terms 'weathering' and 'erosion' interchangeably.
What to Teach Instead
Use a simple analogy: Weathering *breaks* it, Erosion *takes* it. Peer-led sorting activities with photos of geological features can help students practice identifying the specific process at work.
Common MisconceptionMany believe that erosion only happens during big storms or floods.
What to Teach Instead
Explain that while big events cause a lot of change, erosion is a constant, slow process. Discussing how a small local stream changes over several years can help students see the cumulative effect of daily erosion.
Suggested Methodologies
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Frequently Asked Questions
What is the difference between weathering and erosion?
How do plants prevent erosion?
How can active learning help students understand erosion?
What is deposition?
Planning templates for Science
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerThematic Unit
Organize a multi-week unit around a central theme or essential question that cuts across topics, texts, and disciplines, helping students see connections and build deeper understanding.
rubricSingle-Point Rubric
Build a single-point rubric that defines only the "meets standard" level, leaving space for teachers to document what exceeded and what fell short. Simple to create, easy for students to understand.
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