Evidence of Changes Over Time Lesson Plan (TEKS 7.10A): A Complete 5E Lesson for Fossils, Superposition, and Plate Tectonics

Inside the Evidence of Changes Over Time 5E Lesson

The 5E instructional model walks students through five phases: Engage, Explore, Explain, Elaborate, and Evaluate. It flips the traditional lecture-first sequence on its head. Students explore a concept hands-on before you ever explain it, which means by the time you do explain it, they have something to hook the vocabulary onto.

I switched to the 5E model years ago and stopped going back. Kids retain more, ask better questions, and stop staring at me waiting to be told the answer. The Evidence of Changes Over Time 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.

🎯 Engage

Day one is a teacher-led hands-on detective activity. Each small group gets a folder of evidence cards (a photo of fossil shark teeth from a Texas creek bed, a cross-section of rock layers with fossils drawn in, a sliced tree showing rings, and an ice core image with annual layers visible) and a student observation sheet. Following the step-by-step teacher directions, students work through each piece of evidence and write down what it might tell them about Earth's past.

By the end of the period, kids have their own working theory about how scientists piece together the history of Earth. Nobody has heard a vocabulary lecture yet. That's the point. They're walking into the rest of the unit thinking like geologists, not memorizing terms.

What's included in the Engage:

• Teacher directions for the evidence card activity
• Printable student observation sheet
• Answer key for the discussion questions
• Four learning objective slides (standard verbatim, "Analyze and interpret evidence" highlighted, "I CAN...", and "WE WILL...")
• An illustrated Earth Science Word Wall in English and Spanish covering the full unit vocabulary

🔬 Explore

The Evidence of Changes Over Time Station Lab is the heart of the Explore phase. Students rotate through 8 stations (plus a 9th challenge station for early finishers) over one class period. The Station Lab is split into four input stations (where kids take in new information) and four output stations (where they show what they learned).

The four input stations:

• 🎬 Watch It! — Students watch a short video on fossils, superposition, and plate tectonic evidence and answer guided questions.
• 📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
• 🔬 Explore It! — A rock-layer sequencing activity where students place fossils into their correct strata using the law of superposition.
• 💻 Research It! — Reference cards on the geologic time scale, index fossils, and continental fit evidence.

The four output stations:

• 📋 Organize It! — A card sort where students physically place pieces of evidence under the right category (fossil evidence, rock layer evidence, plate tectonic evidence).
• 🎨 Illustrate It! — Students draw a labeled diagram showing how a fossil forms and how superposition reads from bottom to top.
• ✍️ Write It! — Three open-ended questions in complete sentences (this is where you see who really gets it).
• 📝 Assess It! — A short formative check with multiple choice and a fill-in-the-blank vocabulary paragraph.

Print and digital versions are both included. If you want the full breakdown of what happens at every single station, what students produce, and how to set it up, that's in our dedicated Station Lab post.

→ Read the full Evidence of Changes Over Time Station Lab walkthrough 8 stations, materials list, teacher tips

The Station Lab is included in the full 5E lesson. You don't need to buy it separately if you're getting the whole unit.

📚 Explain

Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already touched fossils, sequenced rock layers, and looked at evidence with their own eyes. They have a working understanding before you ever start naming things. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.

The Evidence of Changes Over Time Presentation walks 7th graders through the full scope of TEKS 7.10A, one concept at a time, with diagrams and photographs on nearly every slide. The deck opens with a quick reset on Earth's age (roughly 4.6 billion years) and the essential question driving the unit: how do we know Earth has changed? From there it builds out three big lines of evidence: fossils, the law of superposition, and plate tectonics.

Students learn that fossils are preserved remains or traces of living things, and that they form when an organism with hard parts is rapidly buried in sediment. The deck includes real Texas examples (shark teeth in landlocked counties, marine invertebrates pressed into limestone) that drive home a big idea: where you find a fossil tells you what the environment used to be. Students then meet the law of superposition, the rule that in an undisturbed sequence of sedimentary layers, the oldest layers sit at the bottom and the youngest sit on top. They get a Quick Action INB activity where they place a yellow star at the oldest layer and a blue star at the youngest. The deck also unpacks relative dating and index fossils, which are short-lived, widespread species that let geologists line up rock layers from different parts of the world.

The plate tectonics half of the deck pivots from rocks to maps. Students meet Alfred Wegener and the theory of continental drift, including the evidence Wegener used (puzzle-piece coastlines, matching rock formations across oceans, fossils of Mesosaurus on coasts of South America and Africa). They learn why Wegener's theory was rejected at first (he couldn't explain how continents moved) and how later evidence from mid-ocean ridges and seafloor spreading filled in the missing piece and gave us the modern theory of plate tectonics. A built-in Think About It prompt asks students to use a seafloor age map (younger rock near the ridge, older rock farther away) as evidence that the plates are still moving today.

For every line of evidence, students see multiple representations: a diagram, a real-world photograph, and a sketch they make themselves. That layered repetition is what bakes the analyze and interpret evidence verb of TEKS 7.10A into long-term memory.

What makes this Presentation different from a typical Earth science slideshow is that kids are doing something on almost every single slide. It's not a lecture deck. It's a participation deck. "Your answer:" prompts appear on most slides, Brain Breaks reset attention every few slides, Quick Action INB tasks (the strata-sequencing star activity, the matching-terms activity, the evidence web drag-and-drop) show up throughout, and Think About It prompts push deeper into bigger ideas like geological disturbances and the role humans play in surface change. The deck closes with a Check for Understanding tied back to the Essential Questions: How has Earth changed over time? How does the evidence of fossils, plate tectonics, and superposition support that Earth has changed over time?

The Explain materials in this product include:

• An editable 31-slide Presentation at two differentiated levels (Dependent and Modified), works in PowerPoint or Google Slides
• A guided fill-in-the-blank student notes handout that mirrors the Presentation, with answer key
• A Paper Interactive Notebook (English and Spanish) students cut, fold, and glue into their notebooks
• A Digital Interactive Notebook at both levels with answer keys, for 1:1 classrooms or Google Classroom

The Explain runs across two class periods. The built-in Think About It prompts are where the real discussion happens, so let those breathe.

🛠️ Elaborate

The Elaborate phase is where students stretch what they learned about evidence of Earth's changes and put it into a project of their choosing. In this 7th grade Earth science lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.

Students might build a layered model of rock strata with index fossils embedded at the right levels, or design a museum exhibit panel for a single piece of evidence (a Texas shark tooth, an ice core, a Mesosaurus fossil) explaining what it tells us about Earth's past. There are options for kids who love to write, kids who love to draw, kids who love to build, and kids who love to perform. Whatever the project, the point is the same: students apply fossil, rock layer, and plate tectonic evidence to a real-world artifact instead of a worksheet.

Choice is the whole point. By letting students pick how they show their thinking, you get more authentic work for TEKS 7.10A and you actually get to see what they understand about Earth's history.

The rubric (the part teachers actually want)

Every project, no matter which option a student picks, is graded on a 100-point rubric. Five categories at 20 points each:

• Vocabulary (20 pts) — At least four words from the lesson are used in context.
• Concepts (20 pts) — At least two key concepts from the lesson are referenced.
• Presentation (20 pts) — The project grabs attention and is well-organized.
• Clarity (20 pts) — Easy to understand. Free of typos.
• Accuracy (20 pts) — Drawings and models are accurate. The science is right.

Two differentiated versions in one file

The standard version is for students ready for independent application of evidence analysis. The Reinforcement version is for students who need additional vocabulary or concept support. Three of the six options are swapped for projects with a tighter vocabulary tie-in, and "design your own" is replaced with "collaborate with the teacher" so kids aren't pitching cold.

✅ Evaluate

The Evaluate phase wraps the unit with a formal assessment. It's not all bubble-in. Several questions hand students rock-layer diagrams or fossil distribution maps and ask them to interpret what the evidence shows.

The full assessment has 12 questions across five formats:

• Multiple choice (4 questions) covering fossil formation, the law of superposition, index fossils, and continental drift
• Hotspot / visual (2 questions) where students mark the oldest and youngest rock layers in a diagram and circle the index fossil in a strata image
• Multiselect (2 questions) where students pick all the lines of evidence that support a given claim about Earth's past
• Short answer (2 questions) on what a fossil's location tells us about an ancient environment
• Multipart scenario (2 questions) with a 3-student classroom debate where kids identify which reasoning is correct and which evidence supports it

A modified version is included for students who need additional support, with fewer multiple-choice distractors and sentence-starter scaffolds on the short-answer items.

If you've taught all five phases, this assessment shouldn't surprise anyone. It's a chance for kids to show you they get it.