Earthquakes: Causes and Effects

Active learning helps students grasp the dynamic nature of earthquakes, where abstract stress buildup and wave propagation become visible through hands-on models. When students manipulate materials or data, they connect abstract concepts like strain energy and wave speeds to observable outcomes, building durable understanding.

• Year 9
• Science
• 3 activities
• 45 min–60 min

Case Study Analysis

⏱ 45 min·Small Groups

Plate Boundary Modeling: Hands-On Simulation

Using foam blocks or sponges, students physically demonstrate the three types of plate boundaries. They will push, pull, and slide the blocks to simulate convergent, divergent, and transform movements, observing how friction and sudden slips occur.

Prepare & details

Why does the Earth's crust sometimes suddenly snap and release decades of stored energy in a matter of seconds?

Facilitation Tip: During Modeling Demo: Fault Slip and Rebound, circulate with a timer to ensure each group records observations at set intervals rather than letting the model run without focus.

Setup: Groups at tables with case materials

Materials: Case study packet (3-5 pages), Analysis framework worksheet, Presentation template

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Case Study Analysis

⏱ 60 min·Pairs

Seismic Wave Travel Time Graphing

Students are given data from multiple seismograph stations showing the arrival times of P and S waves for a specific earthquake. They will plot this data on travel time graphs to determine the distance to the epicenter.

Prepare & details

How do seismologists use waves travelling through the Earth to pinpoint the exact location where an earthquake occurred?

Facilitation Tip: In Wave Lab: P and S Wave Simulation, have students switch roles every two minutes so each person measures and records data at least once.

Setup: Groups at tables with case materials

Materials: Case study packet (3-5 pages), Analysis framework worksheet, Presentation template

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Case Study Analysis

⏱ 50 min·Small Groups

Earthquake Hazard Mapping: Local Analysis

Working with local geological maps and historical earthquake data, students identify areas prone to seismic activity and discuss potential hazards like liquefaction or landslides based on soil type and topography.

Prepare & details

What factors determine whether an earthquake causes minor damage in one location but catastrophic destruction in another?

Facilitation Tip: For Data Task: Epicenter Triangulation, provide color-coded rulers and a large wall map to reduce calculation errors and improve group collaboration.

Setup: Groups at tables with case materials

Materials: Case study packet (3-5 pages), Analysis framework worksheet, Presentation template

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Teaching This Topic

Teachers should anchor instruction in concrete experiences before introducing abstract models, starting with the physical fault slip demo to establish the cause of earthquakes. Avoid rushing to formulas; instead, let students derive wave speed differences from their own measurements. Research shows that students retain wave behavior concepts better when they experience the delay between P and S waves firsthand rather than memorizing numbers from a chart.

What to Expect

Successful learning looks like students explaining how plate movements create stress, differentiating wave behaviors through measurement and prediction, and using triangulation to locate an earthquake epicenter. They should confidently discuss factors that amplify damage and critique common misconceptions with evidence from their work.

Watch Out for These Misconceptions

Common Misconception

During Mapping global quakes in small groups, watch for students assuming earthquakes only occur near volcanoes or subduction zones.

What to Teach Instead

Use the global earthquake map from the Fault Slip and Rebound activity to highlight clusters at all plate boundaries, including transform faults, and ask groups to mark intraplate events like Australia’s quakes to correct the misconception.

Common Misconception

During the Richter scale discussion, watch for students equating magnitude with damage levels.

What to Teach Instead

In the Wave Lab, have students compare shaking tables with the same magnitude but different building codes to show how Mercalli intensity varies, then explicitly label seismogram outputs with both scales.

Common Misconception

During the Slinky wave activity, watch for students believing all seismic waves travel at the same speed.

What to Teach Instead

Use the Slinky activity to measure P and S wave speeds with stopwatches, then ask students to predict travel times over long distances to reinforce the speed difference concept.

Assessment Ideas

Quick Check

After Wave Lab: P and S Wave Simulation, provide a simplified seismogram and ask students to label P and S waves, calculate the time difference, and explain how this difference helps locate the earthquake.

Discussion Prompt

After Case Analysis: Damage Factors, present two case studies with similar magnitudes but different damage levels and ask students to identify factors like building codes, population density, and soil type that explain the difference.

Exit Ticket

During Data Task: Epicenter Triangulation, have students write on an index card: one way plate movement causes earthquakes, one factor that influences earthquake damage, and one question they still have about earthquakes.

Extensions & Scaffolding

• Challenge: Ask students to design a building that withstands the shaking data from their Wave Lab results and present blueprints with labeled features.
• Scaffolding: Provide a partially completed triangulation worksheet with two seismograms already plotted to help students focus on the third location.
• Deeper: Have students research how early warning systems use P-wave detection to alert cities seconds before S waves arrive, then write a short report on the technology and limitations.