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Explain How Earth Processes Shape Landforms

Grade 4 Earth Science — Shaping Earth’s Surface | Unit 1, Lesson 6 of 6

📚 Grade: 4th Grade⏱️ Duration: 45–60 minutes🔬 Subject: Earth Science — Shaping Earth’s Surface
🏞️🧠📄
Scientists combine evidence from observations, maps, and models to explain how landforms change.
📋 NGSS Standard:
4-ESS2-1 — Make observations and/or measurements to provide evidence of the effects of weathering or the rate of erosion by water, ice, wind, or vegetation. / 4-ESS2-2 — Analyze and interpret data from maps to describe patterns of Earth’s features.

🎯 Learning Objective

Students will construct an evidence-based explanation for how weathering, erosion, deposition, and timescale help shape a landform.

💡 The Big Idea

A strong Earth Science explanation connects multiple processes, evidence, and timescales instead of naming one isolated fact.

🔬 The Science

Science Snapshot
weatheringerosiondepositionlandform pattern
Landforms often record a sequence of processes rather than a single event.

What is happening?

Strong Earth-science explanations connect a landform to the process that shaped it. That means naming the evidence, the process, and the reason the process would make that particular pattern.

Why it works that way

Weathering supplies sediment, erosion moves it, and deposition builds it somewhere else. Many real landforms are shaped by more than one process over time, so good explanations often link several steps together.

Look for this in the lesson

Students should organize their explanations as a chain of cause and effect. When they can point to multiple pieces of evidence, their argument becomes much stronger.

Ask while you read: Which process came first, and what evidence suggests the order of events?

📦 Materials

🏠 Household Items to Gather

📋 Printables

🧪 Investigation

Step 1 — Review the unit sequence (8 min)
Revisit weathering, erosion, deposition, map evidence, and fast/slow change.
Step 2 — Choose a landform case (10 min)
Use a pictured hill, riverbank, canyon, beach, or delta as the explanation target.
Step 3 — Gather evidence (10 min)
Students list observations, map clues, and process clues that match the case.
Step 4 — Build a claim-evidence-reasoning response (12 min)
Write how the landform changed and which processes were involved.
Step 5 — Share and defend (10 min)
Students explain why their evidence supports their claim better than a weaker explanation.

💬 Discussion Questions

Why is one observation not always enough to explain a landform?Landforms are often shaped by multiple processes over time.
What makes evidence strong in this unit?Specific observations, map details, or model results that connect to the claim.
How can reasoning improve an explanation?Reasoning tells why the evidence supports the claim.
Why should students include timescale?Because some changes happen quickly and some happen gradually.

🚀 Extensions

Extension: Choose a local landform photo and write a short claim-evidence-reasoning explanation for it.

👩‍🏫 Parent/Teacher Notes

Teaching move: Require students to use at least two pieces of evidence and at least two processes when appropriate.

Misconception to catch: Students may think naming vocabulary words counts as explanation. Push for clear cause/effect reasoning.

Student Worksheet

Name: ________________________     Date: ________________________

Construct an evidence-based explanation

Use claim, evidence, and reasoning to explain how a landform changed.

My claimMy evidenceMy reasoning

2️⃣ Which processes were involved?

3️⃣ Draw or label the landform

🔑 PARENT ANSWER KEY — Detach before giving worksheet to students

Sample ideas

A student might explain that rock weathered into smaller pieces, moving water eroded that sediment downhill, and slower water deposited it in a flatter area. Strong answers mention evidence like cracks, slope, channels, or sediment buildup.

✅ What Success Looks Like