How are plastics made? · qAxurWgc__w · 3:46
Sketchnote in the works
status page/video ID saved · analysis package pending
Unit 14 · Capstone · 7th & 8th grade
Natural resources, rearranged.
Nylon, glass, steel, plastic — everything synthetic was something else first: oil, sand, ore, trees. The bottle in your backpack was plankton once. This is the story of how people learned to rebuild matter — and what that costs.
natural → made
6 manipulatives
12 flashcards
1 bottle
the bottle that used to be plankton
The phenomenon · step the journey
The Bottle That Used to Be Plankton
Six steps, a hundred million years, one water bottle. Walk the journey — at every step, ask: what just changed?
step 01 / 06
The ocean, 100 million years ago
Tiny plankton live, die, and sink to the seafloor. Layer after layer of mud buries them deep. Nothing is wasted — just buried.
what changed: living matter → buried matter
That's the whole trick of synthetic materials: nothing new is summoned — something old is rearranged. Oil becomes plastic, sand becomes glass, ore becomes steel, trees become rayon. The resources are natural. The arrangement is us.
Watch · Khan Academy
Plankton to plastic, the KA version
Manipulative · natural or synthetic?
Synthetic = natural + a process
Natural materials come basically ready — wood, cotton, wool, stone. Synthetic materials are made by people from natural resources — nylon from oil, glass from sand. Some are sneaky. Sort them.
Pick a material, then file it.
Natural
harvested, basically ready
Synthetic
made by people, FROM nature
0 / 8 filed
Manipulative · the chain gang
Structure decides function
A monomer is one bead. A polymer is the chain. Link monomers together (polymerization) and the material's personality changes with the chain: longer and crosslinked means tougher. Build a chain and watch it grow a personality.
3 monomers linked
goopy glue — short chains slide everywhere
PET bottles, nylon jackets, polyethylene bags, PVC pipes — all chains, different beads. crosslink the chains (tie them sideways, like vulcanized rubber) and it gets tougher still.
Standard: MS-PS1-3 — synthetic materials come from natural resources and impact society (NGSS Lead States, 2013). DCI: PS1.A Structure and Properties of Matter. CCC: Structure and Function — the chain length and crosslinking ARE the properties. One page serves both trails: capstone of 7th's Earth resources, on-ramp to 8th's chemistry.
The honest ledger
What synthetics give — and cost
The give
Medicine — sterile syringes, IV bags, cheap gloves. Plastics made modern medicine affordable.
Food — sealed packaging means less spoilage, safer shipping, fewer hungry weeks.
Light & cheap — a nylon jacket weighs ounces and outlives a decade of washes.
The cost
Persistence — most plastic refuses to biodegrade. Centuries for one bottlecap.
Microplastics — it doesn't leave, it just gets smaller. Found on Everest and in the deep sea.
Oil dependency — feedstock and fuel, spent every time we make another disposable.
The next move
Know the number — the triangle code 1–7 tells the recycling plant what it's holding. #1 PET and #2 HDPE recycle best.
Refuse first — the greenest plastic is the one never made. Reuse beats recycle beats landfill.
Bio-based options — plastics grown from corn or algae. Same chains, different feedstock.
Myth-busters · tap to flip
Unlearn these three things
Manipulative · Spaced repetition
Say it like a scientist
Twelve words. Flip the card, grade yourself honestly, and the deck schedules your next review — hard words come back sooner. Come back tomorrow and it remembers you. (It lives in your browser, no account.)
–due now
–locked in
–seen so far
flip the card, then grade yourself
Practice · Math skills
The materials tournament
Engineers pick materials by ratio, not vibes: strength per gram for the drone frame, the plastic curve by fold-change, and the bottle math that scales a class to a city. Print it, solve it, check the key.
Sketch · sketchnotes
Follow the material, not just the product
The exact page videos are identified. Printable sheets stay pending until transcript and analysis packages pass the sketchnote source gate.
Introduction to polymers and synthetic fibers · e1PDpTKJtGY · 5:06
Sketchnote in the works
status page/video ID saved · analysis package pending
Investigate · evidence first
Track the chain from source to object
The page's material and impact models remain usable now; a print-first lifecycle record is queued after source review.
Investigation in the works
Use the existing page models now. The exact transcript package and classroom record are still pending.
in the worksExit ticket · 5 questions
Before you leave the refinery
No grade, no stakes — just proof the chains linked. Answer all five to earn the stamp.
question 1 of 5
Everything synthetic was something else first.
Everything you toss goes somewhere.