Science · Grade 4

Active learning ideas

Natural Hazards and Engineering

Active learning makes this topic meaningful because students experience the unpredictability of natural hazards firsthand while testing engineering solutions. When they build and test models, the abstract concepts of force and stability become concrete, and the urgency of preparedness comes alive through their own decisions.

• Ontario Curriculum Expectations
• 4-ESS3-2
• 3-5-ETS1-1

• 40–60 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Inquiry Circle
• 60 min · Small Groups

Inquiry Circle: The Earthquake Shake Table

Groups build structures out of toothpicks and marshmallows, then test them on a 'shake table' (a tray on tennis balls). They must iterate on their design to see which shapes (like triangles) survive the longest.

Design a building to survive a massive earthquake.

Facilitation Tip

During The Earthquake Shake Table, circulate with a stopwatch and ask each group to predict how many shakes their model will survive before collapse, writing predictions on sticky notes to revisit after testing.

What to look for

Present students with images of three different structures: a house on stilts, a building with a flexible frame, and a simple wooden shed. Ask them to identify which structure is best suited for a flood-prone area and which is best suited for an earthquake-prone area, and to briefly explain their reasoning for each.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 02

• Simulation Game
• 50 min · Small Groups

Simulation Game: Flood Defense

Using a sloped tray of soil, students must design a 'town' and then build dams or levees using clay and stones. They pour water at the top and observe which engineering features protected the town from the 'flood.'

Analyze what causes a natural event to become a natural disaster.

Facilitation Tip

While running Flood Defense, stage a sudden ‘storm surge’ by pouring water more quickly to simulate extreme conditions, and observe how teams adjust their barriers mid-test.

What to look for

Pose the question: 'What makes a natural event, like rain or ground shaking, become a natural disaster?' Facilitate a class discussion, guiding students to consider factors like population density, building codes, and preparedness.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 03

• Formal Debate
• 40 min · Whole Class

Formal Debate: Where to Build?

Provide a map with three potential building sites (near a river, on a steep hill, or on flat rock). Students must debate which site is safest from natural hazards and what engineering would be needed for each.

Predict when a volcanic eruption or flood is likely to occur based on scientific data.

Facilitation Tip

Before the Structured Debate on Where to Build, assign roles such as town planner, environmentalist, and resident, and require each student to cite at least one piece of evidence from their investigation or prior lessons.

What to look for

Give each student a card with the name of one natural hazard (earthquake, flood, landslide). Ask them to write down one engineering solution that helps reduce damage from that hazard and one reason why that solution is effective.

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

A few notes on teaching this unit

Teachers should emphasize iterative testing rather than single trials, because real engineering involves cycles of failure and redesign. Avoid rushing to the ‘right’ answer; instead, highlight the scientific process by asking students to document what they changed and why after each test. Research shows that when students feel safe to fail, they engage more deeply with the problem-solving nature of engineering.

Successful learning looks like students using evidence from their models to explain why certain engineering designs reduce damage from specific hazards, and applying that understanding to real-world scenarios. They should articulate trade-offs in design choices, such as flexibility versus stability, and connect their findings to community planning.

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Watch Out for These Misconceptions

• During The Earthquake Shake Table, watch for students describing earthquakes as ‘angry’ or ‘punishing.’ Redirect by asking them to measure the intensity of their shake and relate it to real seismograph data, then discuss how people prepare for predictable shaking patterns.

  During The Earthquake Shake Table, if students assume rigid buildings are stronger, redirect them by asking them to observe which models topple first and which bend but stay standing, then discuss how flexibility absorbs energy.

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Methods used in this brief

• Inquiry Circle
• Simulation Game
• Formal Debate