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Science · 7th Grade
Chemical Reactions
The signs a reaction happened, and the law that governs all of them.
How to use it
Look for the five signs. If none is present, it was probably a physical change.
Free · print-ready PDF · US Letter and A4
- Grade
- 7th Grade
- Ages
- 12–13
- Subject
- Science
- Pages
- 1
The rest of the 7th Grade wall
49 more posters, all free to print — 11 of them here.
SI Units & ConversionsThe seven base units, the metric prefixes and the decimal-move shortcut.Reading the Periodic TableWhat a box tells you, and how groups and periods are organised.AtomsThree particles, where each sits, and what each one decides.Elements, Compounds and MixturesThree levels of 'what is this made of', and how to tell them apart.Getting In and Out of a CellThree ways substances cross the membrane, and which one costs energy.Human Impact on EcosystemsFive ways people change ecosystems, and what each one does.WavesHow energy moves without the material moving with it.Heat TransferThree ways heat moves, and which materials help or block each one.Inherited TraitsWhy you look like your parents but are not identical to either.How Body Systems Work TogetherNo system works alone — five partnerships worth knowing.Solving ProportionsTwo equal ratios, and the cross-multiplication that solves them.