Geography · Year 3

Active learning ideas

Measuring Earthquakes and Volcanoes

Active learning works because students need to experience the abstract nature of logarithmic scales to truly grasp them. Feeling the difference between a magnitude 5 and 6 quake on a shake table makes the Richter scale’s jump from 32 to 320 times more energy tangible. Building and comparing eruption towers lets students see how volume and plume height translate into hazard levels, turning numbers into visible consequences.

• National Curriculum Attainment Targets
• KS2: Geography - Physical Geography

• 20–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Outdoor Investigation Session
• 30 min · Pairs

Pairs: Jelly Quake Simulators

Pairs layer jelly or flour in trays to model Earth's crust. Shake gently (Richter 3-4) then vigorously (6+), noting wave spread and 'damage'. Record observations and compare to real magnitudes on provided charts.

How do scientists measure the strength of an earthquake?

Facilitation Tip

During Jelly Quake Simulators, remind pairs to keep the jelly thickness consistent so they can accurately compare shake effects across trials.

What to look for

Provide students with two cards. On one, they write the name of a scale (Richter or VEI). On the other, they list one thing that scale measures and one example of a natural event it could describe. Collect and review for accurate identification of measurement criteria.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

Activity 02

• Outdoor Investigation Session
• 45 min · Small Groups

Small Groups: VEI Eruption Towers

Groups build baking soda volcanoes in bottles. Add vinegar in increasing volumes to simulate VEI 2-5, measuring plume height and ash spread with rulers. Classify eruptions and match to historical examples.

Differentiate between the Richter scale and the Volcanic Explosivity Index.

Facilitation Tip

As groups build VEI Eruption Towers, circulate to ensure they measure both ejecta volume and plume height to rate their eruptions properly.

What to look for

Present students with a scenario: 'An earthquake measured 6.0 on the Richter scale. Another measured 7.0.' Ask them to write down how much more energy the second earthquake released compared to the first, using the '32 times more' rule. Check for understanding of logarithmic increase.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

Activity 03

• Outdoor Investigation Session
• 25 min · Whole Class

Whole Class: Magnitude Mapping

Project a world map. Teacher announces quakes/volcanoes; class adds magnitude/VEI stickers, discusses patterns near plates. Vote on 'most powerful' and justify using scale facts.

Evaluate the importance of accurate measurement in predicting natural disasters.

Facilitation Tip

For Magnitude Mapping, provide a map with marked epicenters so students can visualize how shaking intensity changes with distance from the quake.

What to look for

Pose the question: 'Why is it important for scientists to have different scales for measuring earthquakes and volcanoes?' Facilitate a class discussion, guiding students to consider the different types of events and the specific hazards each scale helps quantify for safety and planning.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

Activity 04

• Outdoor Investigation Session
• 20 min · Individual

Individual: Scale Sorting Cards

Students sort cards with descriptions, photos, and numbers into Richter/VEI charts. Explain choices to a partner, correcting with fact sheets.

How do scientists measure the strength of an earthquake?

Facilitation Tip

Hand out Scale Sorting Cards one set at a time to prevent students from rushing ahead before understanding each scale’s purpose.

What to look for

Provide students with two cards. On one, they write the name of a scale (Richter or VEI). On the other, they list one thing that scale measures and one example of a natural event it could describe. Collect and review for accurate identification of measurement criteria.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

A few notes on teaching this unit

Teach this topic through layered modeling and comparison. Start with physical simulations to build intuition, then move to visual mapping, and finally to abstract card sorts. Avoid starting with definitions—let students discover patterns first. Research shows concrete experiences solidify understanding before formal vocabulary is introduced. Guide students to articulate differences in purpose between scales before they memorize their names.

Students will confidently identify that the Richter scale measures earthquake energy and the VEI measures eruption size. They will explain why a one-point increase on the Richter scale means much more energy and why a VEI 5 is far larger than a VEI 3. Their discussions and models will show they understand scale differences and impacts vary by location.

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Watch Out for These Misconceptions

• During Jelly Quake Simulators, watch for students who assume cracks in the jelly show the earthquake's strength.

  Prompt pairs to notice how the entire jelly surface shakes, not just the cracks, and ask them to describe how a larger shake changes the whole surface area affected.

• During VEI Eruption Towers, watch for students who think a tall plume always means a bigger eruption.

  Have groups measure both the height of the plume and the volume of materials used, then compare their results to the VEI criteria list to see why volume matters most.

• During Magnitude Mapping, watch for students who believe a higher Richter number always means more damage in the same way.

  Ask students to compare the 2011 Japan quake (9.0) with an example like the 1989 Loma Prieta quake (6.9), guiding them to discuss population density and distance from the epicenter.

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Methods used in this brief

• Outdoor Investigation Session