A strong claim explains why one solution has more merit for reducing a weather hazard.
📋 NGSS Standard: 3-ESS3-1 — Make a claim about the merit of a design solution that reduces the impacts of a weather-related hazard.
🎯 Learning Objective
Students will make and support a claim about which design solution has the most merit for reducing a weather-related hazard.
💡 The Big Idea
A strong science-and-engineering claim does more than name a favorite design. It explains why one solution better reduces the hazard and what evidence supports that choice.
🔬 The Science
Science Snapshot
Preparedness and design can reduce harm even when weather events cannot be stopped.
What is happening?
Reducing weather hazards means changing what people do, what they build, or how they prepare so harm is less likely. Scientists and engineers both contribute by studying patterns and planning safer responses.
Why it works that way
A hazard cannot always be prevented, but its impact can often be reduced. Forecasts, sturdy shelters, emergency kits, drainage systems, and safety routines all lower risk by helping people respond before the danger gets worse.
Look for this in the lesson
Students should separate the weather event from the safety response. That helps them see how preparation changes outcomes even when the weather itself still happens.
Ask while you read: Which action reduces the risk most directly, and what hazard does it target?
Materials
🏠 Household Items to Gather
Printed lesson pages and worksheet
Pencil and colored pencils
Notes from Lessons 4 and 5
📋 Printables
Student Worksheet page from this lesson
Let's Get Started
Step 1 — Review the hazard and solutions (5 min) Remind students what problem they are trying to reduce and which design ideas they compared.
Step 2 — Choose the strongest solution (10 min) Students decide which design has the most merit for the chosen hazard.
Step 3 — List evidence and reasons (10 min) Students write what the solution does and why that matters.
Step 4 — Turn the reasons into a claim (10 min) Students write a complete explanation using evidence and merit language.
Step 5 — Share and revise (10 min) Students listen for missing evidence and improve their claim before finishing.
Discussion Questions
What makes one design solution have more merit than another?It reduces the hazard better and fits the criteria more closely.
Why is evidence important when defending a solution?Evidence turns the claim into something justified instead of only opinion.
How does this lesson connect to weather and hazard learning earlier in the unit?Students use what they learned about patterns, hazards, and impacts to defend a design.
Why should students revise a claim after sharing?Revision helps them notice missing evidence or weak reasoning.
Extensions
Extension: Add one improvement to your chosen design and explain whether it would increase the solution’s merit.
Parent/Teacher Notes
Teaching move: Keep the claim tied to the specific hazard and local conditions instead of letting students write a generic “this is good” answer.
Important misconception to catch: Students may think merit means “most expensive” or “biggest.” Keep the focus on reducing the actual hazard well.
Sentence frame: This design solution has merit because ________________________________.
4️⃣ Quick Revision Check
Checklist
Yes / Not Yet
I named the hazard clearly.
I explained how the solution reduces the impact.
I used evidence, not only an opinion.
🔑 PARENT ANSWER KEY — Detach before giving worksheet to students
1️⃣ Name the Problem — Sample Acceptable Answers
Students should identify a real weather-related hazard and the impact they want to reduce, such as flooding near a building or heat affecting people outdoors.
2️⃣ Choose the Best Solution — Sample Idea
A strong answer explains how the design reduces the specific impact, not just that it “looks helpful.”
3️⃣ Make a Claim — Sample Response
“This design solution has merit because it moves floodwater away from the building and reduces damage during heavy rain.”
4️⃣ Quick Revision Check — Sample Use
Students should use the checklist to notice whether the claim names the hazard, explains the impact reduction, and includes evidence.
✅ What Success Looks Like
Student makes a clear merit claim.
Student connects the solution to a specific hazard and impact.
Student supports the claim with evidence and reasoning.
🛠️ Troubleshooting / Teaching Notes
If a student writes “It is the best” with no reason, ask “Best for what problem?”
If the claim sounds generic, ask the student to add how the design reduces the impact of the specific hazard.
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