Chemistry Games — Predict, Watch, Understand
These free chemistry games let a child predict what matter will do, watch it happen, and see why. Chemistry is full of surprises — burnt paper never comes back, some things refuse to dissolve, and tiny invisible atoms build everything — so guessing first, then watching, is how it makes sense. No ads, no sign-up.
Predict what things are made of — tiny atoms that join into molecules, packed tight or flying free.
Predict the change — reshaping the same stuff, or making a brand-new substance you cannot undo.
Predict what dissolves and how much — some things do not, and water fills up and saturates.
Predict acid or base — sour reds and slippery greens, revealed by an indicator’s color.
Predict if a reaction happened — fizzing gas, a color change, heat or a new solid are the clues.
Predict mixture or compound — jumbled and separable, or atoms bonded into something new.
What kids learn
Matter is made of atoms that join into molecules. It can change in two ways: a physical change (same stuff, new form) or a chemical change (a brand-new substance). Some things dissolve and some do not; acids and bases reveal themselves with an indicator; reactions announce themselves with fizz, color and heat; and a mixture can be separated while a compound is bonded for good. Each game isolates one of these ideas.
More science games
Explore the full set on the science games hub, including matter games and energy games.
Common questions
What is everything made of?
Everything — you, the air, water, a rock — is made of incredibly tiny particles called atoms. Atoms join together into molecules; a water molecule is two hydrogen atoms bonded to one oxygen atom (H₂O). How tightly those particles pack together is what makes something a solid, a liquid or a gas.
What is the difference between a physical and a chemical change?
A physical change just gives the same substance a new form — cutting paper, melting ice, or dissolving sugar. You still have the same stuff. A chemical change makes a brand-new substance: burning paper turns it to ash, iron rusts, an egg cooks. The original is gone and you usually cannot get it back.
What are acids and bases?
Acids are sour (lemon juice, vinegar) and bases are bitter and slippery (soap, baking soda). An indicator — like red-cabbage juice — changes color to reveal which: red for an acid, green or blue for a base, purple for neutral water. Mixing an acid and a base cancels them out.
How do you know a chemical reaction happened?
A chemical reaction leaves clues that a new substance formed: bubbles or fizzing (a gas, like baking soda and vinegar), a color change, heat or light given off, or a new solid appearing. Just dissolving or mixing with no new substance is not a reaction.
What age are these chemistry games for?
Roughly ages 9–13 (grades 4–8), and each game shows its grade band. Atoms, physical-vs-chemical change and solubility suit grades 4–7; acids and bases, reactions and compounds reach grades 5–8. The predict-and-watch format needs no reading-heavy setup.