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Science · 7th Grade
Human Impact on Ecosystems
Five ways people change ecosystems, and what each one does.
How to use it
Pick a local example of each. Most are visible within a few miles.
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.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.Chemical ReactionsThe signs a reaction happened, and the law that governs all of them.How Body Systems Work TogetherNo system works alone — five partnerships worth knowing.Solving ProportionsTwo equal ratios, and the cross-multiplication that solves them.