Model Slow Changes to Earth Activity: 8 Hands-On Stations for Teaching Weathering, Erosion, and Deposition (TEKS 4.10B)

Chris Kesler · 8 min read

The Grand Canyon is a mile deep. The Colorado River cut it. Not in a year, not in a thousand years. In about six million years of water running over the same rock, breaking pieces off, carrying them downstream, and dropping them somewhere else. Every canyon, every beach, every sand dune you've ever seen got there the same way. Slowly. One grain at a time.

That's TEKS 4.10B. It asks 4th graders to model and describe how slow processes like weathering, erosion, and deposition can change Earth's surface over time. The hard part for 4th graders is the SCALE. They've seen a sandcastle wash away in two minutes. They've never watched a mountain slowly turn into a valley because that takes longer than every human who's ever lived combined.

The Model Slow Changes to Earth Station Lab for TEKS 4.10B turns slow change into something kids can see happen in 10 minutes. They pack sand into a sloped "riverbed" with pebbles along the edges, pour water from the top, and watch the sand erode along the path and deposit at the bottom. They study reference cards on landforms (mountains, dunes, canyons, sea stacks) shaped by wind, water, and ice over millions of years. By the end, they can explain a chant they'll remember forever: Weathering breaks it. Erosion takes it. Deposition drops it.

⏱ 1–2 class periods 📓 4th Grade Science 🧪 TEKS 4.10B 🎯 Built-in differentiation 💻 Print or Digital

8 hands-on stations for teaching weathering, erosion, and deposition

A station lab is a student-led activity where small groups rotate through 8 stations (plus a 9th challenge station for early finishers) at their own pace during one to two class periods. You become a facilitator instead of a lecturer. You walk around, spot-check, and break misconceptions while the kids work through the rotation.

The Model Slow Changes to Earth Station Lab has four input stations (where students take in new information on how water, wind, and ice shape Earth) and four output stations (where they show what they learned). Here's what's at each one.

📷 Image slot 1 — add screenshot

📷 Image slot 2 — add screenshot

4 input stations: how students learn weathering, erosion, and deposition

🎬 Watch It! —

A short YouTube video introduces slow changes to Earth using a Lake Erie shoreline example. Three questions on the answer sheet check whether students caught the big ideas: what caused the rocks on the beach to have smooth round edges instead of rough ones (weathering and erosion from water), how erosion is dangerous to a home built along the shoreline of Lake Erie (the ground under the house gets carried away), and how so much sand ended up on the beach and what that process is called (deposition). The video grounds the abstract idea of slow change in a real place kids can picture.

📖 Read It! —

A one-page passage called "Earth's Changing Surface" walks through landforms (mountains, dunes, canyons, valleys, oceans, deltas, rivers) and the three-step process that slowly changes them. Weathering is the breaking down of rocks into smaller pieces called sediment (wind, rivers, rain, and freezing water in cracks all do this). Erosion is the carrying away of those broken-off bits by wind, rivers, or glaciers moving downhill. Deposition is the dropping off of sediment in a new location (sand dunes from wind, deltas from rivers, rocks and soil left behind by melting glaciers). The passage ends with the chant: "Weathering breaks it! Erosion takes it! Deposition drops it!" Three multiple-choice questions follow, plus the five vocabulary words: landforms, weathering, sediments, erosion, deposition. Comes in two reading levels (Dependent and Modified) plus a Spanish version.

🔬 Explore It! —

A model of all three processes in one pan. Each group packs sand into one end of a pan to about 4-5 cm high, creating a slope down to the middle (the other side stays empty). They trace a 1 cm deep "riverbed" from top to bottom with a pencil, then place small pebbles along the edges of the riverbed. They fill a cup with water and slowly pour it from the TOP of the slope and watch the water carry sand from the top toward the bottom, depositing it at the empty end of the pan. Four questions tie the model to the vocabulary: describe what you observed, describe how the model demonstrated weathering, erosion, and deposition. Same model, three different lessons depending on which part of the process you're looking at.

💻 Research It! —

Ten reference cards extend the lab into real landforms. The Landforms cards show photographs of mountains at sunset, hoodoo rock formations, and a wind-carved canyon. The Weathering cards show a glacier, an arch in red rock, and a sea stack with green water/wind/ice icons. The Erosion cards show a green river cutting through a canyon, sand dunes shaped by wind, and a massive blue glacier. The Deposition cards show a river delta from above, a deposited sand dune, and a perched boulder dropped by a melting glacier. Four analysis questions push kids to describe what they notice in each photo set and how landforms are CREATED AND DESTROYED by the three processes happening over and over again.

📷 Featured station deep-dive — add screenshot of the Explore It! task card

4 output stations: how students show what they learned

📋 Organize It! —

A three-column card sort matching three terms (Weathering, Erosion, Deposition) with their definitions and example photos. Weathering matches "breaking down rocks into smaller pieces called sediments" with photos of Horseshoe Bend and a sea-stack arch carved by water. Erosion matches "movement of rocks and sediments from one place to another" with photos of a fast green river through a canyon and a coastal cliff being eaten away. Deposition matches "laying or dropping of rocks and sediments in a new place" with photos of a river delta and a perched boulder. Two-image matches per category force kids to recognize that the SAME force (water) does different jobs at different stages. Cleanest spot in the lab to see whether kids really understand the three-step sequence.

🎨 Illustrate It! —

Students draw three labeled sketches: weathering, erosion, and deposition. Each one has to include what's CAUSING the process (wind, water, or ice). The cause is the part that catches kids. They can draw a rock breaking apart but they have to think about WHY (is it wind hitting it? water freezing in a crack? a glacier scraping over it?). The label requirement (process + cause) makes the teacher's spot-check easy. Walk by and ask "What's causing this weathering?" If the kid points at wind, water, or ice, they got it.

✍️ Write It! —

Three open-ended questions in complete sentences. First, describe the differences between weathering, erosion, and deposition (breaking, moving, dropping). Second, how do water, wind, and ice slowly change Earth's surface (each force does all three jobs over long time scales). Third, describe a situation where you have seen a landform that was created by a slow change to the Earth. The third question is the one that pulls the lab back to real life. Kids who've been to a beach, a canyon, a sand dune, or even just seen a riverbed near their house can name a real landform shaped by these forces.

📝 Assess It! —

Three multiple-choice questions plus a fill-in-the-paragraph that uses the five Read It! vocabulary words (landforms, weathering, sediments, erosion, deposition). The multiple choice covers which processes caused the slow formation of the Grand Canyon (all three: weathering, erosion, deposition), which of the following is NOT a force that causes weathering and erosion (the Sun, since the three forces are wind, water, ice), and what landforms can be slowly created from the three processes (all of the above: canyons, rivers, sand dunes). The fill-in paragraph traces the three-step process using the actual vocabulary. If you're grading this lab, this is the easiest station to grade.

Bonus Challenge It! station for early finishers

🏆 Challenge It! —

Four optional extensions: create a Venn diagram comparing and contrasting ways that Earth's surface can be slowly changed; write a story from the perspective of a mountain experiencing weathering, erosion, and deposition over its life; select at least seven vocabulary terms and make flashcards on index cards with definitions; or create a public service announcement about the dangers of erosion if people build their houses on a cliff by the ocean. Requires teacher approval before they start.

How this fits into a complete Slow Changes to Earth unit

This Station Lab is the Explore day of our full Model Slow Changes to Earth Complete 5E Lesson for TEKS 4.10B. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Model Slow Changes to Earth Station Lab for Explore, PowerPoint slides and interactive notebook pages for Explain, student choice projects to Elaborate, and an Evaluate assessment.

Most 4th-grade teachers I work with grab the full 5E because the Station Lab lands hardest when the days around it support it. But if you just need a strong hands-on day on weathering, erosion, and deposition, the Station Lab on its own does the job.

Two options

Model Slow Changes to Earth 5E Lesson cover

Full 5E Lesson $13.20 Get the 5E Lesson

Model Slow Changes to Earth Station Lab cover

Just the Station Lab $7.20 Get the Station Lab

Materials needed to teach weathering, erosion, and deposition

Materials beyond what's in the download:

A shallow plastic pan or tray per group for the Explore It! Modeling Weathering, Erosion, and Deposition station. A disposable foil baking pan or a small plastic storage bin works. About 9 x 13 inches is the sweet spot. Smaller and the model is cramped, bigger and you'll need too much sand.
About 2 cups of sand per group for the slope. Play sand from a hardware store is cheapest ($5 for a 50-pound bag, way more than you need). Pour into a sealed container at the end and reuse next year.
A handful of small pebbles per group for the riverbed edges. Aquarium gravel works. So do small stones from the playground.
A plastic cup of water and a pencil per group. The pencil is for tracing the riverbed in the sand. Any cup that holds about 8 oz works.
Paper towels and an extra tray under each model pan. Pouring water on sand makes a mess. Plan for it.
Colored pencils or markers for the Illustrate It! station.
Pencils and the printed answer sheets (included)
A device with internet for the Watch It! station

If you're like most 4th-grade teachers, you can stock this entire lab for under $20. Sand is the most expensive piece and one bag will run this lab for 5+ years. Pans, cups, and pencils are already in your classroom. The model is the same in October as it is in May. Tuck the pans and sand in a bin after the unit and you're set.

Standard covered: Texas TEKS 4.10B —

Model and describe how slow processes such as weathering, erosion, and deposition can change Earth's surface over time.

See the full standard breakdown →

Grade level: 4th grade Earth science

Time: One to two class periods (45–110 minutes total). Plan for two periods the first time you run this lab because the Explore It! sand-and-water model takes setup time.

Common student misconceptions this lab fixes

"Mountains and canyons formed quickly, like in a few years or maybe one big storm."
This is the single biggest 4th-grade trap on this standard. Kids can't picture a million years, so they collapse the time scale and assume major landforms must have formed fast. The Read It! passage names it directly: landforms change "very slowly over time." The Research It! Landforms cards show massive features (the Grand Canyon, sea stacks, hoodoos in Bryce Canyon) that took millions of years to form. The Explore It! model is the trick to making slow change visible in 10 minutes. Kids see the EXACT same process (water carrying sand from a high point to a low point) happening fast in their pan, then translate that to the real-world version that happens over geologic time. The Assess It! question about the Grand Canyon ties this together. Six million years of the Colorado River doing what their water-and-sand model did in 10 minutes.
"Weathering, erosion, and deposition are all the same thing. They all just mean rocks breaking."
4th graders hear three new vocabulary words for what sounds like one process and decide they're synonyms. The Read It! passage breaks them apart explicitly with the chant: "Weathering breaks it! Erosion takes it! Deposition drops it!" Three different jobs. The Explore It! sand model shows all three happening in one demonstration. The TOP of the slope is where the water breaks loose grains of sand (weathering). The middle of the riverbed is where the water carries the sand along (erosion). The bottom of the pan is where the sand piles up (deposition). Same water, three different jobs, three different stages. The Organize It! card sort puts photo evidence under each category and forces kids to tell them apart. By the time they hit the Write It! questions, they're using the three terms correctly because they SAW the difference.
"Once a mountain or canyon is formed, it stays the same forever."
4th graders look at the Grand Canyon, the Rocky Mountains, or Niagara Falls and assume those things have always looked exactly that way. The Research It! Card 10 directly addresses it with the question "How are landforms created AND destroyed by the processes of weathering, erosion, and deposition?" Landforms aren't a finished product. They're in the middle of a process that doesn't stop. The Grand Canyon is still being deepened by the Colorado River right now. Niagara Falls is slowly moving upstream every year. Sea cliffs erode and houses fall into the ocean (the Watch It! video uses this exact example with Lake Erie). The processes that built every landform are STILL building and unbuilding them every day. The Challenge It! Public Service Announcement card about building a house on a cliff over the ocean reinforces it. Slow change is also constant change.

What you get with this Slow Changes to Earth activity

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Station Lab, you get a single download with everything you need:

Print version at two reading levels (Dependent for on-grade, Modified for additional support) plus a Spanish Read It! passage
Digital version as PowerPoint files (works in Google Slides too) at both levels — for 1:1 classrooms or Google Classroom
Teacher Directions and Answer Key for both versions, all keys included
Station task cards ready to print, laminate, and drop in baskets at each station
Reference cards for the Research It! station (10 cards covering landforms, weathering, erosion, and deposition with real-world photos plus four analysis questions)
Explore It! task cards with step-by-step instructions for the sand-and-water riverbed model
Sort cards for the Organize It! station (3 processes matched with definitions and 2 photo examples each)
Student answer sheets for each level

Tips for teaching weathering, erosion, and deposition in your 4th grade classroom

Two things make this lab go smoother the first time:

1. Pre-pour water for the Explore It! station.

The Explore It! model only works if the kids pour the water SLOWLY from the top of the slope. If they dump it, the whole slope collapses, the pebbles wash away, and the model looks like a mess instead of a controlled demonstration of erosion. Pre-fill plastic cups halfway with water (not all the way) and remind kids before they start that this is supposed to mimic a slow river, not a flash flood. A bottle with a small spout works even better than a cup if you have it. The slower the pour, the cleaner the visible erosion path.

2. Build one model yourself before the rotation.

If you're like most 4th-grade teachers, the first time you run this lab the question "how deep is 1 cm" or "how steep should the slope be" comes up at every group. Save yourself the trip by building one model at the front of the room before kids start the rotation. Show them the 4-5 cm slope on one side, the empty area on the other side, the pencil-traced riverbed, and the pebbles along the edges. Walk through how to pour the water at the top. Five minutes of front-loading saves 15 minutes of running between groups during the rotation.

Get this Slow Changes to Earth activity

Model Slow Changes to Earth Station Lab for 4th grade Earth science — TEKS 4.10B

Buy the Station Lab — $7.20

Or if you want the full two-week experience with the Engage hook, Explain day, Elaborate extension, and Evaluate assessment all included:

Buy the full 5E Complete Lesson — $13.20

(Station Lab is included)

Frequently asked questions

What does TEKS 4.10B cover?

Texas TEKS 4.10B asks 4th grade students to model and describe how slow processes such as weathering, erosion, and deposition can change Earth's surface over time. By the end of this lab, kids should be able to define and tell apart the three processes (weathering breaks it, erosion takes it, deposition drops it), identify wind, water, and ice as the three main forces that drive them, and explain that big landforms (canyons, mountains, sand dunes) form slowly over thousands or millions of years.

Why does this lab focus on slow change instead of fast change?

Because the standard does. TEKS 4.10B specifically asks about slow processes. Fast changes to Earth (volcanoes, earthquakes, landslides) are covered in other parts of the curriculum. The hard concept for 4th graders is that the Grand Canyon, the Rocky Mountains, and every sand dune they've ever seen took thousands or millions of years to form. The Explore It! model lets them see the same process happening in 10 minutes so they can imagine what it looks like stretched across geologic time.

How long does this Slow Changes to Earth activity take?

One to two class periods (45 to 110 minutes total). The Explore It! sand-and-water model takes longer than a typical input station because of setup (packing the sand slope, tracing the riverbed, placing pebbles) and observation, so plan for two periods the first time. Once your class has the rotation routine down, most groups can finish all 8 stations in one period.

Will this lab make a mess?

Yes, but it's a containable mess. Sand plus water in a pan stays in the pan as long as the kids don't slosh it around. Put a plastic tray or piece of newspaper UNDER each model pan to catch any drips. Have a broom and a damp paper towel ready for the cleanup at the end. The mess is worth it. The Explore It! sand model is the part kids remember six months later when you're reviewing for state testing.

Can I use this in a 1:1 digital classroom?

Yes. The full digital version (PowerPoint or Google Slides) works in 1:1 classrooms and Google Classroom. Students drag digital cards at the Organize It! process-definition-photo sort and type their answers on the answer sheet. The Explore It! sand-and-water model is harder to digitize. You can substitute a short YouTube video showing the same experiment (search for "weathering erosion deposition demo with sand" and there are dozens of good 2-3 minute clips), or set up one teacher demo at the front of the room and have the digital classroom answer the questions based on the demo.