Energy Transformations in Systems Activity: 8 Hands-On Stations for Teaching the Law of Conservation of Energy (TEKS 6.8B)
Ask a 6th grader where the energy goes when they ride a bike to a stop. They'll usually say it "runs out" or "gets used up." Both wrong. The energy from the chocolate milk they drank at lunch became motion in their legs, motion in the wheels, heat in the brake pads, and a little bit of sound when the rubber squeaked on the pavement. The total never changed. It just kept changing form.
That's the law of conservation of energy. It's one of the biggest ideas in science, and 6th graders meet it for the first time in TEKS 6.8B. The standard asks them to track energy through a system (a roller coaster, a circuit, a food web, anything) and show that no energy is created or destroyed, only transformed.
The Energy Transformations in Systems Station Lab for TEKS 6.8B closes that gap in one to two class periods. Kids watch a lava lamp (electrical → thermal → kinetic), build a simple circuit (chemical → electrical → light), wind up a toy (elastic → kinetic → thermal), and trace energy through photosynthesis, food chains, and a 10% energy pyramid. By the end, they can name every form of energy in a system and explain where it goes next.
8 hands-on stations for teaching energy transformations
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 kids work through the rotation.
The Energy Transformations in Systems Station Lab has four input stations (where students take in new info on systems, energy forms, and the law of conservation of energy) and four output stations (where they show what they learned). Here's what's at each one.
4 input stations: how students learn energy transformations
A short YouTube video shows a classic bowling-ball pendulum demonstration: a guy lets a heavy bowling ball swing toward his face from the top of a ladder, and the ball stops just short. Three questions tie it back to where the ball has maximum potential vs. maximum kinetic energy, how the demo proves the law of conservation of energy, and why a dinosaur figure placed in the path got smacked while the man's face didn't. Visual learners come alive at this station because they SEE conservation of energy in real time.
A one-page passage called "The Energy Journey of a Roller Coaster" walks students through every energy transformation on a coaster ride: the motor (electrical → mechanical) pulls the car up, gravity drops it (potential → kinetic), friction makes heat (kinetic → thermal). The vocabulary is bolded throughout (system, transform, law of conservation of energy, conserved, transfer). Three multiple-choice questions follow, plus the vocab notes section. Comes in two reading levels (Dependent and Modified) plus a Spanish version.
This is the heart of the lab. Three hands-on activities. Activity 1: Observe a lava lamp that's already running and identify the energy transformations (electrical → thermal → kinetic motion of the blob). Activity 2: Build a simple circuit with a battery, wires, and a small electrical device, watch it operate, and trace the energy chain. Activity 3: Wind up a toy and track elastic → kinetic → thermal as friction slows it down. Six questions tie all three back to the law of conservation of energy. Plus a Forms of Energy reference card on the table for kids who blank on the names.
Students examine 10 reference cards covering biological energy systems: photosynthesis (sun → chemical energy in glucose), food chains and food webs, the energy pyramid showing the 10% rule (with bananas → fruit flies → toucans → jaguars and the percentages decreasing at each level), and the role of decomposers. Four questions check whether they can identify the primary source of energy for the food web, the energy transformation in photosynthesis, how energy moves up trophic levels, and how the whole system demonstrates conservation of energy.
4 output stations: how students show what they learned
A two-column card sort. Kids match seven everyday scenarios with their energy transformation chains. Examples: turning on a flashlight → chemical → electrical → light → thermal. Riding a bike after eating lunch → chemical → mechanical. Photosynthesis → light → chemical. Skydiving → gravitational → kinetic. Rubbing hands together → kinetic → thermal. Cooking on a gas stove vs. an electric stove (chemical → thermal vs. electric → thermal) makes for a great compare-and-contrast moment. Easy to spot-check at a glance.
Students pick one system (a food chain, an electrical circuit, or a roller coaster) and sketch it with arrows showing energy flow at each step. They label each form of energy along the way. Even kids who say "I can't draw" surprise themselves here. The arrows are what reveal whether they understand conservation: every arrow has to lead somewhere, energy can't just stop.
Three open-ended questions: how a roller coaster demonstrates conservation of energy, how energy flows in a food web from the Sun to a top predator, and what energy transformation happens in a battery-and-bulb circuit. This is the writing practice middle schoolers need and rarely get in science class.
Eight multiple-choice and fill-in-the-paragraph questions tied to TEKS 6.8B vocabulary (system, transform, law of conservation of energy, conserved, transfer). Includes which option correctly defines conservation of energy, the correct order of energy flow in a Sun → plant → rabbit → fox food web, and the energy chain in a wind turbine that powers a radio (kinetic → mechanical → electrical → sound). The fill-in paragraph weaves all five vocabulary words together. If you're grading the lab, this is the easiest station to grade.
Bonus Challenge It! station for early finishers
Four optional extensions: build a 10-word vocabulary crossword puzzle, design and document a model experiment that shows conservation of energy (marble run, pendulum, etc.), create a comic strip illustrating an energy transformation step by step, or write an acrostic poem using "CONSERVATION." Requires teacher approval before they start.
How this fits into a complete energy transformations unit
This Station Lab is the Explore day of our full Energy Transformations in Systems Complete 5E Lesson for TEKS 6.8B. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Energy Transformations in Systems 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 energy transformations and conservation, the Station Lab on its own does the job.
Materials needed to teach energy transformations
Materials beyond what's in the download:
- One small lava lamp for the Explore It! Activity 1. Plug it in 20 minutes before class so the blob is moving by the time the first group rotates in.
- A simple circuit kit per station rotation: a battery (AA or 9V), two short wires with alligator clips, and a small electrical device (LED, mini buzzer, or small motor with a wheel).
- A small wind-up toy for Activity 3. Cheap mechanical wind-up toys from a party-supply or toy store work great.
- 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
Standard covered: Texas TEKS 6.8B —
Investigate methods of thermal energy transfer, including conduction, convection, and radiation, and provide evidence supporting that the law of conservation of energy applies in transformations of energy in systems. Supporting Standard.
See the full standard breakdown →Grade level: 6th grade physical 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
- "Energy gets used up. When my bike stops, the energy is gone."
This is the big one. Sixth graders see motion stop and assume energy disappeared. The Watch It! bowling-ball pendulum video forces them to realize energy doesn't vanish, it converts. The Explore It! wind-up toy makes it physical. The toy slows down because elastic energy turns into kinetic energy turns into thermal energy at the gears and against the table. None of it disappears. The Illustrate It! station with arrows showing energy flow seals it: every arrow has to lead somewhere.
- "Heat is not really energy. It's just temperature."
Many 6th graders walk in thinking thermal energy is its own separate thing, not a form of energy. The Forms of Energy reference card lists thermal alongside chemical, electrical, kinetic, light, and the rest. Then the Explore It! activities show kinetic → thermal in the wind-up toy, electrical → thermal in the lava lamp, and chemical → thermal in cooking on a gas stove. The Organize It! card sort makes them write "thermal" as the destination of energy in three different scenarios. By the end, thermal is just another form of energy that energy can transform into.
- "Plants make their own energy. They don't need anything."
Photosynthesis is one of those terms 6th graders have heard since 3rd grade but rarely understand at the energy-transformation level. The Research It! photosynthesis card spells it out: sunlight (light energy) plus water and carbon dioxide → glucose (chemical energy) plus oxygen. Plants don't "make" energy. They transform light energy from the sun into chemical energy stored in sugar. The Organize It! card matches "photosynthesis in a leaf" with "light → chemical." Once kids see plants as energy transformers, the rest of the food web makes sense.
What you get with this energy transformations activity
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 (photosynthesis diagram, food chains and webs, energy pyramid with 10% rule, decomposers) plus the Forms of Energy reference card for the Explore It! station
- Sort cards for the Organize It! station (7 everyday scenarios matched with their energy transformation chains)
- Student answer sheets for each level
Tips for teaching energy transformations in your 6th grade classroom
Two things make this lab go smoother the first time:
1. Plug in the lava lamp 20 minutes before class.
The Explore It! Activity 1 is the lava lamp, and the whole point is that kids see the blob actively moving. A cold lava lamp just looks like wax sitting in liquid. If you flip the switch as students walk in, the first group rotates through and gets nothing. Plug it in before you even start your warm-up so it's bubbling by the time the first group hits the station.
2. Test the simple circuit kit before class.
Battery-and-LED circuits work great when they work. They feel like sabotage when they don't. Dead batteries, blown LEDs, broken wire connections, all common. Set up one circuit kit in advance and confirm it lights up. Then build the rest of the kits the same way. Bring two spare batteries and one spare LED. If a group hits a dead kit mid-rotation, hand them a working spare and keep things moving.
Get this energy transformations activity
Or if you want the full two-week experience with the Engage hook, Explain day, Elaborate extension, and Evaluate assessment all included:
(Station Lab is included)
Frequently asked questions
What does TEKS 6.8B cover?
Texas TEKS 6.8B asks 6th grade students to provide evidence supporting that the law of conservation of energy applies in transformations of energy in systems. Students should be able to look at any system (a circuit, a roller coaster, a food web, an amusement park ride) and trace how energy flows from one form to another, showing that the total energy stays the same even as it transforms.
Is this kids' first time meeting conservation of energy?
Yes for most 6th graders. They've seen examples of energy in earlier grades (light, heat, motion), but "the law of conservation of energy" as a formal idea is brand new. The Read It! roller coaster passage introduces it in bold, the Watch It! bowling-ball pendulum video is the visual anchor, and the Organize It! card sort tests whether they can apply it to seven different real-life scenarios.
How long does this energy transformations activity take?
One to two class periods (45 to 110 minutes total). The Explore It! station's three hands-on activities are the longest piece, so 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 a lot of supplies for this?
A small lava lamp, a few simple circuit kits (battery + wires + LED or motor), and a wind-up toy. Total cost for a class of 30: under $25 if you're starting from nothing. The Watch It! station also needs a device with internet.
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 the digital reference cards instead of physically modeling. The Explore It! hands-on activities are harder to digitize. You can substitute simulation videos or PhET energy simulations if you don't have the supplies.
Related resources
- Texas teacher? See the full TEKS 6.8B standard breakdown for misconceptions, phenomena, and engagement ideas.
- Need TEKS 6.8A first? Check out our Compare & Contrast Energies Station Lab for TEKS 6.8A, where students learn the eight forms of energy before tracing transformations.
- Heading into Energy of Waves next? See our Energy of Waves Station Lab for TEKS 6.8C.
