Landform Changes

Grade: 2nd

Duration: 45 minutes

Class Size: 15 students

Subject: Science

Common Core State Standards Alignment

Next Generation Science Standards (NGSS) – Applicable for Science

2-ESS2-1: Develop a model to represent the shapes and kinds of land and bodies of water in an area.
ESS2.C: The natural resources including land and water can change over time due to natural processes such as erosion.
CCC (Crosscutting Concepts): Patterns; Cause and Effect

Common Core ELA Connections (for Literacy in Science)

CCSS.ELA-LITERACY.RI.2.3: Describe the connection between a series of historical events, scientific ideas or concepts, or steps in technical procedures in a text.
CCSS.ELA-LITERACY.SL.2.1: Participate in collaborative conversations with diverse partners about grade 2 topics and texts with peers and adults in small and larger groups.

Learning Objectives

By the end of this lesson, students will be able to:

Explain what erosion is and identify how small pieces of rock moved by erosion can cause large changes over time. (NGSS 2-ESS2-1)
Use a simple map to locate landforms and bodies of water and describe how places change with erosion. (NGSS 2-ESS2-1, 3.1 Key Concept)
Understand that many small changes over time cause big changes in landforms, demonstrating cause and effect. (Key Concepts 3.3, 3.4)
Collaborate in a small group discussion to answer key investigation questions and use evidence from observations. (CCSS.SL.2.1)

Materials Needed

Large printed or projected map of a recreation center area with cliffs, water, and landforms labeled
Small clear plastic containers (one per group)
Sand, small pebbles, soil (to simulate landform)
Small cups of water (for simulating erosion)
Illustrated erosion process steps chart
Whiteboard and markers
Student notebooks and pencils
Timer/clock

Lesson Flow

1. Introduction & Engagement (7 minutes)

Engage: Begin with a question: "Have you ever noticed how land by the water looks different after a rain or storm?" Show a picture of a cliff and ask students what might happen to it over many days or months.
Activate Prior Knowledge: Briefly discuss what erosion means — moving small pieces of rock or soil by wind or water.
Chapter Question: Write on the board: “How did the recreation center's cliff erode without the director noticing?”
Set Purpose: Tell students they will investigate how small changes add up to big changes in landforms.

2. Exploration – Hands-on Erosion Simulation (15 minutes)

Group Activity: Divide students into groups of 3 (5 groups total). Each group gets a small container filled with sand, pebbles, and soil to form a mini cliff.
Instruction: Slowly pour small cups of water over the "cliff" simulating rain and waves. Observe and note what happens to the sand and pebbles — they move little by little.
Discussion Prompt: Ask “How did the water move the small pieces? What might happen if this keeps happening every day?”
Objective: Students see firsthand how many small movements of rocks and soil cause the cliff to change shape over time.

3. Explanation & Map Activity (10 minutes)

Map Introduction: Show the large map of the recreation center area. Identify the cliff, water bodies, and land.
Guided Practice: Ask students to find the cliff and discuss: “If erosion happens at the cliff little by little over weeks, how does the land around it change? How can maps help us see these changes?”
Concept Reinforcement: Explain that maps help us track water and land locations and changes over time (3.1 Key Concept).
Reflection: Have students briefly draw and label their own simple map in notebooks showing water and the cliff before and after erosion.

4. Discussion & Cause-Effect Wrap Up (8 minutes)

Group Share: Each group shares what they saw in their erosion container and how the cliff changed.
Cause & Effect Chart: On the whiteboard, make a cause-effect chart:
- Cause: Water moves small pieces of soil and rock (erosion) → Effect: Cliff shape changes slowly.
- Small changes happen every day → Big changes over a long time.
Directly Address Investigation Question: "If erosion moves small pieces of rock, how can it cause a big change?" Students answer verbally or using a sentence starter: "Erosion causes big changes because..."

5. Conclusion & Assessment (5 minutes)

Exit Ticket: Each student writes one sentence or draws a picture that answers: “How did the recreation center’s cliff erode without the director noticing?”
Teacher Check: Collect exit tickets for quick assessment of understanding.
Final Thought: Remind students that nature changes slowly but always keeps changing — even when we don’t notice right away!

Differentiation

For ELL/Struggling Students: Use visual supports like pictures and the erosion steps chart. Pair them with a peer for the hands-on activity.
For Advanced Students: Ask them to predict what other landforms might change over time by erosion or wind and why.

Teacher Reflection Notes

Was the hands-on erosion activity engaging and clearly showing the gradual change process?
Did students grasp the map’s role in showing land and water and changes over time?
Did the cause-effect discussion clarify how many small events add up?
Use exit tickets to plan follow-up lessons or small group reinforcement if needed.

This lesson builds both scientific understanding and language skills in an interactive, age-appropriate way directly reflecting key Common Core and NGSS standards. It integrates visual, tactile, and discussion-based learning ideal for 2nd graders exploring landform changes.

Teaching Instructions