Evidence of Changes Over Time Activity: 8 Hands-On Stations for Teaching Fossils, Plate Tectonics, and Superposition (TEKS 7.10A)

Chris Kesler · 8 min read

Pull up a map of the world and ask a 7th grader if they think the continents have always looked this way. Most of them say yes. Then point at South America and Africa and ask them to slide one against the other. The eastern coast of South America fits the western coast of Africa like a puzzle piece. The room goes quiet. That's the moment Pangaea stops being a vocab word and becomes a real thing.

Earth has been changing for 4.5 billion years. We know this because we can read three different lines of evidence: fossils that show up on continents thousands of miles apart, plate boundaries that build mountains and split oceans, and layers of sedimentary rock that stack the past on top of itself. Kids hear the words "continental drift" and "superposition" but they rarely connect them. They are three ways of telling the same story.

The Evidence of Changes Over Time Station Lab for TEKS 7.10A closes that gap in one to two class periods. Kids slide cut-out continents across a table to recreate Pangaea, Gondwana, and Laurasia from 300 million years ago to today. They study a map of Mesosaurus and Glossopteris fossils that span four continents. They read a column of sedimentary rock and figure out which fossil is oldest. By the end, they can argue from evidence that Earth is constantly changing.

⏱ 1–2 class periods 📓 7th Grade Science 🧪 TEKS 7.10A 🎯 Built-in differentiation 💻 Print or Digital

8 hands-on stations for teaching evidence of changes over time

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 the Pangaea reconstructions, and break misconceptions while kids work through the rotation.

The Evidence of Changes Over Time Station Lab has four input stations (where students take in new info on fossil evidence, plate tectonics, and superposition) and four output stations (where they show what they learned). Here's what's at each one.

📷 Image slot 1 — add screenshot

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4 input stations: how students learn evidence of changes

🎬 Watch It! —

A short YouTube video introduces continental drift, the Ring of Fire, and the evidence scientists use to support the theory that the continents are moving. Three questions follow: who introduced the idea of continental drift, what percentage of Earth's earthquakes and volcanoes occur along the Ring of Fire, and three types of evidence that support continental movement. Visual learners come alive at this station before they ever pick up a continent cutout.

📖 Read It! —

A one-page passage called "Evidence of the Changing Earth" walks students through the three lines of evidence (fossils, plate tectonics, superposition) and how each one helps scientists understand how Earth has changed over its 4.5-billion-year history. Three multiple-choice questions follow, plus five vocabulary words to define (fossil, lithosphere, plate boundary, plate tectonics, superposition). Comes in two reading levels (Dependent and Modified) plus a Spanish version.

🔬 Explore It! —

This is the heart of the lab. Students get cutouts of the seven continents and rebuild Earth's history backwards. They start at present day, then arrange the continents into the Cretaceous (65 million years ago), then Jurassic (150 mya), then Triassic (200 mya) with Laurasia and Gondwana, then all the way back to Pangaea (225 mya). Three reflection questions wrap it up: do the shapes of the continents support continental drift, how do matching fossils on the eastern coast of South America and western coast of Africa fit, and what will the continents look like millions of years from now? The moment a kid slides South America into Africa and watches the coastlines lock together, Pangaea stops being abstract.

💻 Research It! —

Students examine 15 reference cards: a description of fossil evidence, a fossil key showing Mesosaurus, Cynognathus, Glossopteris, Flora, and Lystrosaurus, a world map showing where each fossil was found across South America, Africa, India, Antarctica, and Australia, a tectonic plates map, a movement-of-plates map, an explanation of the law of superposition, and a sedimentary-rock column with five numbered fossils (Trilobite, Gastropod, Seymouria, T. Rex, Ammonite). Eight questions check whether they can identify which plates are moving apart versus together, where the oldest fossils sit in a rock column, and where they would expect to find an early human fossil. The Indian-Eurasian plate boundary creating the Himalayas catches kids who don't see why mountains form.

📷 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. Kids sort six evidence statements into Fossil Evidence, Tectonic Plate Evidence, and Superposition Evidence piles. "Scientists found Mesosaurus fossils in both South America and Africa" goes under fossil. "The Indian Plate and the Eurasian Plate are moving towards each other, creating the Himalaya Mountains" goes under tectonic. "A T. Rex fossil was found above a Trilobite in sedimentary rock, which shows that it is younger" goes under superposition. Easy to spot-check at a glance.

🎨 Illustrate It! —

Students sketch a column of undisturbed sedimentary rock and place four fossils at the correct depth based on age: Fossil #1 (300 million years), Fossil #2 (65 million years), Fossil #3 (230 million years), and Fossil #4 (165 million years). The 300-million-year-old fossil goes deepest, the 65-million-year-old fossil sits closest to the top. The drawing locks in superposition in a way the reading alone cannot.

✍️ Write It! —

Three open-ended questions: which form of evidence (fossil, tectonic plate, or superposition) provides the best argument that Earth is constantly changing, how do we use multiple types of evidence to support that plates are always moving, and why does the law of superposition only apply to undisturbed rocks. The third question is the killer. It forces kids to think about what happens when an earthquake or a volcano flips the layers, and why scientists need pristine rock columns to date fossils.

📝 Assess It! —

Three multiple-choice questions plus a fill-in-the-paragraph that uses all five Read It! vocabulary words (fossil, superposition, plate tectonics, lithosphere, plate boundary). The paragraph reads like a quick review: "___ evidence is the remains or traces of organisms that once lived on Earth. The law of ___ is evidence found in layers of sedimentary rock..." If you're grading the lab, this is the easiest station to grade.

Bonus Challenge It! station for early finishers

🏆 Challenge It! —

Four optional extensions: predict Earth's future continental arrangement using the Pangaea cutouts and explain the evidence used, write a creative story from the perspective of an animal that died 300 million years ago and was found as a fossil in South America, design an infographic showing the three types of evidence and how scientists use them, or research index fossils and write five sentences about why they matter to geology and paleontology. Requires teacher approval before they start.

How this fits into a complete evidence of changes over time unit

This Station Lab is the Explore day of our full Evidence of Changes Over Time Complete 5E Lesson for TEKS 7.10A. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Evidence of Changes Over Time Station Lab for Explore, PowerPoint slides and interactive notebook pages for Explain, student choice projects to Elaborate, and an Evaluate assessment.

Most teachers grab the full 5E because the Station Lab lands hardest with the days around it. But if you just need a strong hands-on day on fossils, plate tectonics, and superposition, the Station Lab on its own does the job.

Two options

Evidence of Changes Over Time 5E Lesson cover

Full 5E Lesson $13.20 Get the 5E Lesson

Evidence of Changes Over Time Station Lab cover

Just the Station Lab $7.20 Get the Station Lab

Materials needed to teach evidence of changes over time

Materials beyond what's in the download:

Scissors for cutting out the seven continent shapes (one set per group, or pre-cut a class set ahead of time).
Colored pencils or markers for the Illustrate It! sedimentary-rock column.
Index cards if you want a hard-copy version of the Organize It! evidence sort or for any flashcard Challenge It! work.
Pencils and the printed answer sheets (included)
A device with internet for the Watch It! YouTube video

Standard covered: Texas TEKS 7.10A —

Model and describe how changing surface and subsurface conditions over time, including the action of fossil-forming processes and plate tectonics, are reflected in the rock and fossil records. Supporting Standard.

See the full standard breakdown →

Grade level: 7th grade Earth science

Time: One to two class periods (45–110 minutes total). Plan for two periods the first time you run a station lab.

Common student misconceptions this lab fixes

"The continents have always been in their current locations."
Kids look at a world map and assume that's just the way Earth is. The Explore It! station hits this head on. Students physically slide North America, South America, Africa, Europe, Asia, Australia, and Antarctica backward through five geological time periods until everything fits together as Pangaea 225 million years ago. The moment they realize the eastern coast of South America fits the western coast of Africa like a puzzle piece, the abstract idea of "continental drift" becomes a concrete observation. The Research It! fossil-evidence map then locks it in by showing matching Mesosaurus and Glossopteris fossils on continents that are now thousands of miles apart but used to be one landmass.
"Plate boundaries all do the same thing."
Kids hear "plate boundary" and think every boundary creates the same kind of feature. The Research It! station walks through three different boundary interactions on the global plate map. The boundary between the African Plate and the South American Plate is moving apart, creating new lithosphere on the ocean floor. The Indian Plate and the Eurasian Plate are moving together, building the Himalayas (the tallest mountains on Earth). The Pacific Plate and the North American Plate are sliding past each other off the coast of California, which is why earthquakes happen there. The Write It! question ("Explain how we use multiple types of evidence to support the theory that plates are always moving") forces kids to use all three examples in one answer.
"The law of superposition works for any rock layer."
Kids treat "oldest on the bottom, newest on top" as a universal rule. The Read It! passage and the Research It! cards both stress one critical word: undisturbed. The Write It! station drives this home with the question "Why does the law of superposition only apply to rocks that are undisturbed?" When earthquakes, volcanic intrusions, or tectonic uplift flip or fold rock layers, the sequence breaks. The Illustrate It! station has students draw four fossils (300 million, 230 million, 165 million, 65 million years old) into a sedimentary column. Get the order right, and you have just used superposition. Get it wrong, and a tilted-rock photo on the Read It! card shows what happens when nature shuffles the deck.

What you get with this evidence of changes over time 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 (fossil-evidence map, tectonic plates map, plate-movement map, fossils-in-layers diagram)
Continent cutouts for the Explore It! Pangaea reconstruction
Sort cards for the Organize It! station (six evidence statements grouped by fossil, tectonic, or superposition)
Student answer sheets for each level

No login required. Download once, use forever. Reprint as many times as you want.

Tips for teaching evidence of changes over time in your 7th grade classroom

Two things make this lab go smoother the first time:

1. Pre-cut the continent shapes for at least one group.

The Explore It! station gives kids cutouts of all seven continents to physically arrange into Pangaea. If every group has to cut their own, you lose 10 minutes per rotation. Pre-cut one full set, laminate it, and drop it in a labeled baggie. Then the cutouts last from period to period and class to class without falling apart. If you have time, cut a few sets so multiple groups can run the station in parallel.

2. Have kids do the time periods in reverse order.

The Explore It! cards are numbered: 1 is present day, 5 is Pangaea (225 million years ago). Tell kids to work backward from today (which they recognize) into the deeper past. That way, instead of trying to figure out where Pangaea broke into Gondwana and Laurasia, they're undoing what they already know. Once they see how the continents fit together, the journey forward in time makes sense without anyone needing to memorize period names.

Get this evidence of changes over time activity

Evidence of Changes Over Time Station Lab for 7th grade Earth science — TEKS 7.10A

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 7.10A cover?

Texas TEKS 7.10A asks 7th grade students to model and describe how changing surface and subsurface conditions over time, including fossil-forming processes and plate tectonics, are reflected in the rock and fossil records. By the end, students should be able to use fossil evidence, plate tectonics, and the law of superposition to argue that Earth has changed dramatically over its 4.5-billion-year history. This Station Lab covers all three lines of evidence in one rotation.

What's the difference between continental drift and plate tectonics?

Continental drift is the original idea (introduced by Alfred Wegener in 1912) that the continents have moved over time. Plate tectonics is the modern theory that explains why and how. Earth's lithosphere is broken into large rigid plates that float on a hot, semi-molten layer underneath. The plates collide, pull apart, and slide past each other, which moves the continents that sit on top of them. Continental drift is the observation; plate tectonics is the mechanism.

How long does this evidence of changes over time activity take?

One to two class periods (45 to 110 minutes total). The Explore It! Pangaea reconstruction takes a bit of time the first time through because kids have to figure out the puzzle. Plan for two periods the first time you run a station lab. Once your class has the rotation routine down, most groups can finish all 8 stations in one period.

Do I need to provide my own materials?

Scissors, colored pencils, and index cards. Total cost for a class of 30: under $5 if you don't already have these supplies. The Watch It! station also needs a device with internet. Everything else (continent cutouts, fossil-evidence maps, tectonic plates maps, sort cards, answer sheets) is in the download.

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. The continent cutouts can be replaced by drag-and-drop continent shapes in the digital version, or you can keep the Explore It! station as the one physical center kids rotate through while the other 7 stations run digitally.