Learning path · Beginner
Everyday Chemistry
The chemistry in your kitchen, your body and the world around you: water, reactions, acids and bases, and the molecules of life.
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Start the pathLessons
- 1
Matter, Energy & Physics
Atoms
Everything you can touch is made of atoms, and atoms are almost entirely empty space. Here is what they are, how we know, and why the tiny nucleus holds so much power.
4 min read 4-question quiz
- 2
Matter, Energy & Physics
The Periodic Table
One chart holds every kind of atom in the universe, arranged so that its pattern predicts how each one behaves. Here is how to read it and why it works.
4 min read 4-question quiz
- 3
Chemistry
Water: The Strangest Ordinary Substance
Water covers most of the planet and makes up most of your body, yet it breaks nearly every rule a small molecule should follow. Those quirks are why life exists.
3 min read 4-question quiz
- 4
Chemistry
Chemical Reactions
Burning, rusting, cooking and digesting are all chemical reactions: atoms swapping partners to make new substances. Here is what happens and why some reactions go with a bang.
3 min read 4-question quiz
- 5
Chemistry
Acids and Bases
Lemon juice, stomach acid, soap and bleach all sit on one scale: pH. Learn what makes something acidic or alkaline, and why the balance matters in your body and the oceans.
3 min read 4-question quiz
- 6
Chemistry
The Chemistry of Life
Every living thing is built from four families of carbon-based molecules: carbohydrates, fats, proteins and nucleic acids. Here is what each one does.
3 min read 4-question quiz
