Investigating Cliff Changes

Grade Level

2nd Grade

Duration

45 minutes

Class Size

15 students

---

Standards Alignment

Next Generation Science Standards (NGSS)

• 2-ESS2-1: Develop a model to represent the shapes and kinds of land and bodies of water in an area.
• 3-ESS2-1: Represent data in tables and graphical displays to describe typical weather conditions expected during a particular season.
• (This lesson focuses on cross-grade connection for 2nd and 3rd grade concepts.)

Common Core State Standards (CCSS) for English Language Arts

• CCSS.ELA-LITERACY.RI.2.3: Describe the connection between a series of scientific ideas or concepts.
• CCSS.ELA-LITERACY.SL.2.1: Participate in collaborative conversations with diverse partners about grade 2 topics and texts.
• CCSS.MATH.PRACTICE.MP4: Model with mathematics (measuring erosion and scale).

---

Learning Objectives

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

1. Identify how erosion can move small pieces of rock and cause large changes over time.
2. Use and interpret simple maps showing land, water, and landforms.
3. Explain how a cliff can change slowly without people noticing immediately.
4. Model erosion processes through hands-on activities demonstrating scale.
5. Discuss findings and share observations using scientific vocabulary.

---

Materials Needed

• Large printed or drawn map of the recreation center area with clear land and water features outlined
• Small container with sand, small pebbles, and dirt to simulate a cliff section
• Spray bottles filled with water to simulate erosion (one per small group)
• Rulers or measuring tape
• Whiteboard or chart paper for recording observations
• Magnifying lenses (one per student)
• Clipboards, pencils, and observation sheets with a simple table for recording changes
• Visual aids: photos or diagrams showing erosion process at different scales

---

Lesson Breakdown

1. Engage (5 minutes)

• Question: "Have you ever seen a cliff or a rock wall change over time?"
• Show an image of a cliff near a water body. Ask students, “What do you notice about this cliff?”
• Introduce the chapter question: “How did the recreation center’s cliff erode without the director noticing?”
• Invite a quick class brainstorm: What is erosion? (Guide them to understand erosion as moving small pieces of rock or soil by water, wind, or ice.)

---

2. Explore (15 minutes)

Hands-on Erosion Simulation:

• Break the class into 3 small groups (5 students each).
• Each group gets a container representing a cliff made of sand, pebbles, and dirt.
• Students take turns gently spraying water from the spray bottle over their "cliff."
• Use magnifying lenses to closely observe what happens to the small particles.
• Students measure the height or changes in the cliff edge using rulers before and after spraying.
• Observe and record: How much soil or sand moved? Did the cliff change shape?

Teacher’s Role: Circulate to guide observations and help students use scientific language such as “particles,” “movement,” “edge,” “scale,” and “change.”

---

3. Explain (10 minutes)

• Gather students back together.
• Discuss: “If erosion moves only small pieces, how does it cause a big change?” Connect this to their observations.
• Introduce map reading: Show a simple map of the recreation center with cliffs and water.
• Explain how maps help us see landforms and places where erosion happens, even if changes are slow.
• Show how small changes on the ground could eventually cause big differences on this map over time, reinforcing scale.

---

4. Elaborate (10 minutes)

Map Activity:

• Give each student a simplified printed map of the recreation center’s cliff and water.
• Ask students to circle or color the cliff area and mark where erosion might happen.
• Prompt them to predict where the cliff might shrink if erosion continues.
• Encourage students to explain their reasoning in pairs.
• Students then share predictions with the class, practicing scientific explanation and vocabulary.

---

5. Evaluate (5 minutes)

• Quick formative assessment: Students complete a short exit ticket with these questions:
  1. What is erosion?
  2. How can erosion cause big changes if it only moves little pieces?
  3. Why might a director not notice the cliff changing right away?
• Collect exit tickets to assess conceptual understanding.
• Also assess participation in group activities and map predictions.

---

Differentiation and Supports

• Provide additional visual aids and step-by-step instructions for students needing extra help.
• Encourage advanced students to measure precise changes and calculate difference in cm.
• Use peer pairing for English Language Learners (ELLs) to support understanding.

---

Teacher Reflection

• Did students grasp that small changes accumulate over time to create large-scale landform changes?
• Were students able to use maps to locate erosion areas?
• How effectively did the hands-on activity convey the concept of scale in erosion?
• Adjust next lessons based on engagement and assessment results.

---

Vocabulary

• Erosion
• Scale
• Map
• Landform
• Cliff
• Particles
• Observation

---

This lesson plan blends tactile investigations, map skills, and scientific explanation to make the abstract process of erosion concrete and accessible for 2nd graders, while aligning with NGSS and Common Core standards.