Energy, waves, structures and Earth’s changing surface — fourth grade science, and the year the word “energy” starts doing real work.
Fourth grade is where energy stops being a synonym for enthusiasm and becomes a quantity that moves between things. That shift is genuinely hard, and it is not helped by the fact that every adult in a child’s life uses the word loosely. If a student leaves this year still thinking energy is a kind of fuel that gets used up, the middle school energy standards will not land either.
This guide covers the four strands, what goes wrong in each, and the order that makes the energy idea stick. The matching worksheets and unit bundles are in the fourth grade collection on Teachers Pay Teachers.
Energy, motion and transfer (4-PS3-1, 4-PS3-2, 4-PS3-3, 4-PS3-4)
Energy related to the speed of an object, transferred by sound, light, heat and electric currents, changed in collisions, and converted deliberately in a device students design.
Where students get stuck: energy gets used up. A ball rolls, slows, stops — the energy is gone. Fourth graders are not ready for a formal conservation law, but they are entirely ready for the question where did it go? Rub two hands together and feel the warmth. The answer is that it moved and spread out, not that it vanished, and a class that has that sentence is in good shape for years.
The other trap is treating energy and force as the same thing. A hard push is more force; a fast-moving object has more energy. Collisions are where the confusion surfaces, and 4-PS3-3 is the natural place to separate them — ask what changed about each object, and insist on speed rather than “power.”
Standards covered: 4-PS3-1, 4-PS3-2, 4-PS3-3, 4-PS3-4
Waves and how we see (4-PS4-1, 4-PS4-2, 4-PS4-3)
Wave amplitude and wavelength, light reflecting off objects into the eye, and patterns used to transfer information.
Where students get stuck: waves carry stuff. Watching a wave cross a pond, children conclude the water traveled with it. Drop a cork in and it bobs in place. The wave moves; the water does not go anywhere. This is the idea that makes sound, light and eventually every wave standard coherent, and the cork does it in thirty seconds.
4-PS4-2 deserves particular attention because it is an explicit correction of a misconception the standards writers knew was there: light reflects off an object and enters the eye. Many students — and a surprising number of adults — hold a model where vision is something the eye does outward. Draw the arrows. Make students draw the arrows. Then ask why you cannot see a black cat in a dark room.
Standards covered: 4-PS4-1, 4-PS4-2, 4-PS4-3
Structures, senses and survival (4-LS1-1, 4-LS1-2)
Internal and external structures that support survival and reproduction, and how animals take in information through their senses and process it.
Where students get stuck: structures described by what they are rather than what they do. “A fish has gills” is a label. “Gills let a fish take oxygen out of water, which is why it dies in air” is the standard. Push every answer one step further by asking what would happen without it — the function becomes visible only when you remove the structure.
4-LS1-2 is quietly the more interesting standard, and the one most often skipped. Information comes in through a sense, gets processed, and produces a response — a chain, not a reflex. It is the first appearance of the systems thinking that runs through the rest of their science education, and it connects directly back to the wave standards, since sight and hearing are the sensory end of the same physics.
Standards covered: 4-LS1-1, 4-LS1-2
Earth’s surface, resources and hazards (4-ESS1-1, 4-ESS2-1, 4-ESS2-2, 4-ESS3-1, 4-ESS3-2)
Patterns in rock layers and fossils, weathering and erosion, mapping Earth’s features, energy and fuels from natural resources, and reducing the impact of natural hazards.
Where students get stuck: weathering and erosion get used interchangeably. Weathering breaks rock down where it sits; erosion carries the pieces away. Students who blur them cannot explain why a canyon exists — something has to both break the rock and remove it. Two separate words for two separate jobs, demonstrated in a stream table, and the confusion does not return.
Fossils are the second snag, and the fix is the same one that works in third grade: a fossil is evidence about a place, not just an old animal. A marine fossil on a hilltop is the entire lesson.
Standards covered: 4-ESS1-1, 4-ESS2-1, 4-ESS2-2, 4-ESS3-1, 4-ESS3-2
Sequencing the year
Energy first and slowly. It is the hardest idea in the grade and everything else borrows from it — waves are energy moving, senses are energy detected, fuels are energy stored. Waves second, so the connection is still live. Structures and senses next, which lets you close the loop from the physics back to the organism. Earth’s surface last, where the long-timescale work can run in the background.
If your pacing forces a cut, do not cut 4-PS4-2. It is a single standard about arrows on a diagram, and it repairs a misconception that otherwise persists into adulthood.
Materials
Editable, standards-aligned worksheets and unit bundles for every strand above are in the fourth grade collection on Teachers Pay Teachers. Everything is editable, because no lesson survives first contact with someone else’s class unchanged.
For the physical side — circuit kits, light and mirror sets, stream tables and the storage that keeps them usable — the classroom equipment guide covers what holds up to a full class and what quietly stops working by spring.
Going deeper
Fourth grade is the first year where a student can produce a completely correct answer built on a completely wrong model — which makes it the first year where assessment design really matters. Assessments That Actually Measure Thinking is about catching that, and Science Is a Way of Thinking is about the reasoning you are trying to build. The first lesson of each is free to read, no signup.
And if the wider question interests you — why science literacy is worth this much effort in the first place — that is what The Price of Illiteracy is about.
Related guides
- 3rd Grade Science: Forces, Ecosystems & Earth Systems
- 5th Grade Science: Matter, Space & Earth Systems
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