Free Printable Science Crossword Puzzle
Ready to print right now, with an answer key. Written clues, three grid sizes, a 74-clue science list behind it, and a new layout every time you press the button. No account, nothing to install.
Science Crossword
Free and unlimited, no account. Every puzzle is laid out fresh in your browser from the 74-clue science list.
Every clue in the science list
The puzzle above draws from these 74 clued science words each time you press New puzzle — a different subset and layout every time, always from this same list.
- Lemon juice, on the pH scale
- Study of stars and planets
- Gas layer around a planet
- Smallest unit of an element
- Single-celled microbes
- Organ of thought in the skull
- Element in all organic life
- Basic unit of living things
- Spinning machine that separates samples
- Science of substances and reactions
- Gene-carrying strand in a nucleus
- Icy body with a glowing tail
- Solid with a repeating lattice
- Facts gathered in an experiment
- Community of organisms and habitat
- Flow of charge through wires
- Negatively charged particle
- Substance on the periodic table
- Capacity to do work
- Protein that speeds reactions
- Liquid escaping as a gas
- Darwin's theory of change
- Controlled test of a hypothesis
- Lab bottle with a narrow neck
- Push or pull on an object
- Ancient remains preserved in rock
- Milky Way, for one
- Unit of heredity
- Pull that makes apples fall
- Thermal energy
- Gas that fuels the Sun
- Educated guess to be tested
- Metal that rusts
- Room full of beakers and flasks
- Focused beam of light
- Curved glass that bends light
- What a prism splits into colors
- Water's state at room temperature
- Object that attracts iron
- Amount of matter in an object
- Anything with mass and volume
- Reading from a ruler or scale
- Body's chemical processing of food
- Copper or gold, for example
- Instrument for viewing tiny cells
- Bonded group of atoms
- Fiber carrying signals in the body
- Uncharged particle in a nucleus
- Core of an atom
- Noting what happens in a test
- Path of a planet around the sun
- Gas we breathe to live
- Tiny bit of matter
- Science of motion and forces
- Mars or Jupiter
- Force spread over an area
- Glass that splits white light
- Molecule built from amino acids
- Positively charged particle
- Energy given off in rays
- Chemical change in a beaker
- Sodium chloride
- Moon or orbiting probe
- Researcher in a lab coat
- State of ice or rock
- Vibration you can hear
- Group that can interbreed
- Stargazer's tube
- How hot or cold it is
- Tool for measuring heat
- All of space and everything in it
- Tiny germ that needs a host
- Mountain that erupts lava
- Ripple carrying energy
Which size to print
Easy lays 8 clues into an 11 × 11 grid, using words of three to seven letters. Medium is 13 × 13 with 12 clues and words up to nine letters. Hard is 15 × 15 with 16 clues and words from four to eleven letters, which is where the crossings start doing real work. The generator places longest words first and only keeps a layout where every word crosses at least one other, so a puzzle that comes out with fewer clues than the label promises simply ran out of words that fit — it is still a complete, connected crossword.
Printing it well
Print puts the grid and both clue lists on one sheet with the controls hidden. Print once with answers off, then press Answers and print again for the filled grid — that order gives you a clean puzzle and a separate key. The PNG is rendered at three times screen size and the answer file saves under its own name, so the two never get mixed up.
Using these in a book you sell
Puzzles generated here are yours to use, including in a book you publish. What this page will not do is build the book: a paperback needs dozens of puzzles at a fixed trim size with paired solution pages and consistent margins. KDP Creator does that part — and hands back numbered 300-DPI PNG pages plus a manifest, not a finished PDF, so you assemble the interior yourself. The royalty calculator prices it before you commit.
