Science & Education
Free PNG images in the section “Science & Education”: 19 files with transparent background, no sign-up.
Skeletal formulas of heterocycles and drug molecules — acridine, chromene, fused rings with bridgehead nitrogens — a ball and stick model with a red oxygen, a reaction scheme with bracketed intermediates, a pulley worksheet, a lab scene with gloved hands and a notched polygon for an area exercise.
Chemistry
14
Molecule
5
Science
3
Experiment
2
Physics
2
Laboratory
2
Biology
2
Mathematics
2
Geometry
2
Education
2
Telescope
1
Atom
1
Notebook
1
Research
1
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Categories in the section
Science & Education covers both subjects and settings: Chemistry, Molecule, Formula, Physics, Biology, Mathematics and Geometry on one side; School, Classroom, University, Laboratory, Library, Blackboard and Graduation on the other. For lesson material, start with the subject; for a school website, start with the setting.
Chemistry leads
The current mix is dominated by structural formulas drawn in the standard skeletal style: carbon atoms implied at the corners, heteroatoms lettered, stereochemistry shown by wedge bonds. They are publication-grade line art, useful for a lecture slide, a compound entry or a revision sheet. Scale them no smaller than half a slide, or the letters become unreadable.
Beyond the formulas
A handful of files cover practical work: a laboratory worksheet on pulleys with a procedure list, a pair of gloved hands with a glass plate, a geometry shape ready for a problem set. The chart of node-and-edge diagrams belongs in a mathematics lecture. The black butterfly is an outsider, useful for a stencil but not for a science page.